<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2022 Workiva-->
<!--r:3e1d328a-649b-461e-baca-b7b27dbbb993,g:99997a1b-c3c8-49d5-b29b-fd47a869f1ff-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:gntx="http://www.gentex.com/20211231" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2020-01-21" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.gentex.com/20211231">
  <xs:import namespace="http://fasb.org/srt/2021-01-31" schemaLocation="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap/2021-01-31" schemaLocation="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd"/>
  <xs:import namespace="http://www.w3.org/1999/xlink" schemaLocation="http://www.xbrl.org/2003/xlink-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2020-01-21" schemaLocation="https://www.xbrl.org/dtr/type/2020-01-21/types.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/country/2021" schemaLocation="https://xbrl.sec.gov/country/2021/country-2021.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2021q4" schemaLocation="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd"/>
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="gntx-20211231_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="gntx-20211231_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="gntx-20211231_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="gntx-20211231_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="CoverPage" roleURI="http://www.gentex.com/role/CoverPage">
        <link:definition>0001001 - Document - Cover Page</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AuditInformation" roleURI="http://www.gentex.com/role/AuditInformation">
        <link:definition>0002002 - Document - Audit Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedBalanceSheets" roleURI="http://www.gentex.com/role/ConsolidatedBalanceSheets">
        <link:definition>1001003 - Statement - Consolidated Balance Sheets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedBalanceSheetsParenthetical" roleURI="http://www.gentex.com/role/ConsolidatedBalanceSheetsParenthetical">
        <link:definition>1002004 - Statement - Consolidated Balance Sheets (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsofIncome" roleURI="http://www.gentex.com/role/ConsolidatedStatementsofIncome">
        <link:definition>1003005 - Statement - Consolidated Statements of Income</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsofComprehensiveIncome" roleURI="http://www.gentex.com/role/ConsolidatedStatementsofComprehensiveIncome">
        <link:definition>1004006 - Statement - Consolidated Statements of Comprehensive Income</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsofShareholdersInvestment" roleURI="http://www.gentex.com/role/ConsolidatedStatementsofShareholdersInvestment">
        <link:definition>1005007 - Statement - Consolidated Statements of Shareholders' Investment</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsofShareholdersInvestmentParenthetical" roleURI="http://www.gentex.com/role/ConsolidatedStatementsofShareholdersInvestmentParenthetical">
        <link:definition>1006008 - Statement - Consolidated Statements of Shareholders' Investment (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsofCashFlows" roleURI="http://www.gentex.com/role/ConsolidatedStatementsofCashFlows">
        <link:definition>1007009 - Statement - Consolidated Statements of Cash Flows</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingandReportingPolicies" roleURI="http://www.gentex.com/role/SummaryofSignificantAccountingandReportingPolicies">
        <link:definition>2101101 - Disclosure - Summary of Significant Accounting and Reporting Policies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingandReportingPoliciesPolicies" roleURI="http://www.gentex.com/role/SummaryofSignificantAccountingandReportingPoliciesPolicies">
        <link:definition>2202201 - Disclosure - Summary of Significant Accounting and Reporting Policies (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingandReportingPoliciesTables" roleURI="http://www.gentex.com/role/SummaryofSignificantAccountingandReportingPoliciesTables">
        <link:definition>2303301 - Disclosure - Summary of Significant Accounting and Reporting Policies (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingandReportingPoliciesScheduleofAllowanceforDoubtfulAccountsDetails" roleURI="http://www.gentex.com/role/SummaryofSignificantAccountingandReportingPoliciesScheduleofAllowanceforDoubtfulAccountsDetails">
        <link:definition>2404401 - Disclosure - Summary of Significant Accounting and Reporting Policies (Schedule of Allowance for Doubtful Accounts) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingandReportingPoliciesNarrativeDetails" roleURI="http://www.gentex.com/role/SummaryofSignificantAccountingandReportingPoliciesNarrativeDetails">
        <link:definition>2405402 - Disclosure - Summary of Significant Accounting and Reporting Policies (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingandReportingPoliciesScheduleofAssetsorLiabilitiesHavingRecurringMeasurementsDetails" roleURI="http://www.gentex.com/role/SummaryofSignificantAccountingandReportingPoliciesScheduleofAssetsorLiabilitiesHavingRecurringMeasurementsDetails">
        <link:definition>2406403 - Disclosure - Summary of Significant Accounting and Reporting Policies (Schedule of Assets or Liabilities Having Recurring Measurements) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingandReportingPoliciesScheduleofAmortizedCostUnrealizedGainsandLossesandMarketValueofInvestmentSecuritiesDetails" roleURI="http://www.gentex.com/role/SummaryofSignificantAccountingandReportingPoliciesScheduleofAmortizedCostUnrealizedGainsandLossesandMarketValueofInvestmentSecuritiesDetails">
        <link:definition>2407404 - Disclosure - Summary of Significant Accounting and Reporting Policies (Schedule of Amortized Cost, Unrealized Gains and Losses, and Market Value of Investment Securities) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingandReportingPoliciesScheduleofUnrealizedLossesonInvestmentsDetails" roleURI="http://www.gentex.com/role/SummaryofSignificantAccountingandReportingPoliciesScheduleofUnrealizedLossesonInvestmentsDetails">
        <link:definition>2408405 - Disclosure - Summary of Significant Accounting and Reporting Policies (Schedule of Unrealized Losses on Investments) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingandReportingPoliciesFixedIncomeSecuritiesContractualMaturityDetails" roleURI="http://www.gentex.com/role/SummaryofSignificantAccountingandReportingPoliciesFixedIncomeSecuritiesContractualMaturityDetails">
        <link:definition>2409406 - Disclosure - Summary of Significant Accounting and Reporting Policies (Fixed Income Securities Contractual Maturity) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingandReportingPoliciesInventoriesDetails" roleURI="http://www.gentex.com/role/SummaryofSignificantAccountingandReportingPoliciesInventoriesDetails">
        <link:definition>2410407 - Disclosure - Summary of Significant Accounting and Reporting Policies (Inventories) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingandReportingPoliciesLeasesDetails" roleURI="http://www.gentex.com/role/SummaryofSignificantAccountingandReportingPoliciesLeasesDetails">
        <link:definition>2411408 - Disclosure - Summary of Significant Accounting and Reporting Policies (Leases) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingandReportingPoliciesLeasesDetails_1" roleURI="http://www.gentex.com/role/SummaryofSignificantAccountingandReportingPoliciesLeasesDetails_1">
        <link:definition>2411408 - Disclosure - Summary of Significant Accounting and Reporting Policies (Leases) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingandReportingPoliciesScheduleofEarningsPerShareBasicandDilutedDetails" roleURI="http://www.gentex.com/role/SummaryofSignificantAccountingandReportingPoliciesScheduleofEarningsPerShareBasicandDilutedDetails">
        <link:definition>2412409 - Disclosure - Summary of Significant Accounting and Reporting Policies (Schedule of Earnings Per Share, Basic and Diluted) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtandFinancingArrangements" roleURI="http://www.gentex.com/role/DebtandFinancingArrangements">
        <link:definition>2113102 - Disclosure - Debt and Financing Arrangements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtandFinancingArrangementsDetails" roleURI="http://www.gentex.com/role/DebtandFinancingArrangementsDetails">
        <link:definition>2414410 - Disclosure - Debt and Financing Arrangements (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxes" roleURI="http://www.gentex.com/role/IncomeTaxes">
        <link:definition>2115103 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesTables" roleURI="http://www.gentex.com/role/IncomeTaxesTables">
        <link:definition>2316302 - Disclosure - Income Taxes (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesScheduleofComponentsofProvisionforIncomeTaxesDetails" roleURI="http://www.gentex.com/role/IncomeTaxesScheduleofComponentsofProvisionforIncomeTaxesDetails">
        <link:definition>2417411 - Disclosure - Income Taxes (Schedule of Components of Provision for Income Taxes) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesScheduleofEffectiveIncomeTaxRatesDifferentfromStatutoryFederalIncomeTaxRatesDetails" roleURI="http://www.gentex.com/role/IncomeTaxesScheduleofEffectiveIncomeTaxRatesDifferentfromStatutoryFederalIncomeTaxRatesDetails">
        <link:definition>2418412 - Disclosure - Income Taxes (Schedule of Effective Income Tax Rates Different from Statutory Federal Income Tax Rates) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesScheduleofDeferredIncomeTaxAssetsandLiabilitiesDetails" roleURI="http://www.gentex.com/role/IncomeTaxesScheduleofDeferredIncomeTaxAssetsandLiabilitiesDetails">
        <link:definition>2419413 - Disclosure - Income Taxes (Schedule of Deferred Income Tax Assets and Liabilities) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesNarrativeDetails" roleURI="http://www.gentex.com/role/IncomeTaxesNarrativeDetails">
        <link:definition>2420414 - Disclosure - Income Taxes (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesScheduleofReconciliationofBeginningandEndingAmountofUnrecognizedTaxBenefitsDetails" roleURI="http://www.gentex.com/role/IncomeTaxesScheduleofReconciliationofBeginningandEndingAmountofUnrecognizedTaxBenefitsDetails">
        <link:definition>2421415 - Disclosure - Income Taxes (Schedule of Reconciliation of Beginning and Ending Amount of Unrecognized Tax Benefits ) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EmployeeBenefitPlans" roleURI="http://www.gentex.com/role/EmployeeBenefitPlans">
        <link:definition>2122104 - Disclosure - Employee Benefit Plans</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EmployeeBenefitPlansDetails" roleURI="http://www.gentex.com/role/EmployeeBenefitPlansDetails">
        <link:definition>2423416 - Disclosure - Employee Benefit Plans (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockBasedCompensationPlans" roleURI="http://www.gentex.com/role/StockBasedCompensationPlans">
        <link:definition>2124105 - Disclosure - Stock-Based Compensation Plans</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockBasedCompensationPlansTables" roleURI="http://www.gentex.com/role/StockBasedCompensationPlansTables">
        <link:definition>2325303 - Disclosure - Stock-Based Compensation Plans (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockBasedCompensationPlansNarrativeDetails" roleURI="http://www.gentex.com/role/StockBasedCompensationPlansNarrativeDetails">
        <link:definition>2426417 - Disclosure - Stock-Based Compensation Plans (Narrative) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockBasedCompensationPlansSummaryofSharesUnder2019OmnibusIncentivePlanDetails" roleURI="http://www.gentex.com/role/StockBasedCompensationPlansSummaryofSharesUnder2019OmnibusIncentivePlanDetails">
        <link:definition>2427418 - Disclosure - Stock-Based Compensation Plans (Summary of Shares Under 2019 Omnibus Incentive Plan) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockBasedCompensationPlansScheduleofWeightedAverageAssumptionsDetails" roleURI="http://www.gentex.com/role/StockBasedCompensationPlansScheduleofWeightedAverageAssumptionsDetails">
        <link:definition>2428419 - Disclosure - Stock-Based Compensation Plans (Schedule of Weighted-Average Assumptions) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockBasedCompensationPlansSummaryofStockOptionActivityDetails" roleURI="http://www.gentex.com/role/StockBasedCompensationPlansSummaryofStockOptionActivityDetails">
        <link:definition>2429420 - Disclosure - Stock-Based Compensation Plans (Summary of Stock Option Activity) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockBasedCompensationPlansScheduleofNonVestedStockOptionActivityDetails" roleURI="http://www.gentex.com/role/StockBasedCompensationPlansScheduleofNonVestedStockOptionActivityDetails">
        <link:definition>2430421 - Disclosure - Stock-Based Compensation Plans (Schedule of Non-Vested Stock Option Activity) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockBasedCompensationPlansVestedRestrictedStocksDetails" roleURI="http://www.gentex.com/role/StockBasedCompensationPlansVestedRestrictedStocksDetails">
        <link:definition>2431422 - Disclosure - Stock-Based Compensation Plans (Vested Restricted Stocks) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockBasedCompensationPlansRestrictedShareAwardActivityDetails" roleURI="http://www.gentex.com/role/StockBasedCompensationPlansRestrictedShareAwardActivityDetails">
        <link:definition>2432423 - Disclosure - Stock-Based Compensation Plans (Restricted Share Award Activity) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockBasedCompensationPlansEmployeeStockPurchasePlanDetails" roleURI="http://www.gentex.com/role/StockBasedCompensationPlansEmployeeStockPurchasePlanDetails">
        <link:definition>2433424 - Disclosure - Stock-Based Compensation Plans (Employee Stock Purchase Plan) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Contingencies" roleURI="http://www.gentex.com/role/Contingencies">
        <link:definition>2134106 - Disclosure - Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentReporting" roleURI="http://www.gentex.com/role/SegmentReporting">
        <link:definition>2135107 - Disclosure - Segment Reporting</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentReportingTables" roleURI="http://www.gentex.com/role/SegmentReportingTables">
        <link:definition>2336304 - Disclosure - Segment Reporting (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentReportingScheduleofAutomotiveandOtherSegmentReportingDetails" roleURI="http://www.gentex.com/role/SegmentReportingScheduleofAutomotiveandOtherSegmentReportingDetails">
        <link:definition>2437425 - Disclosure - Segment Reporting (Schedule of Automotive and Other Segment Reporting) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentReportingScheduleofMajorProductLineRevenuesDetails" roleURI="http://www.gentex.com/role/SegmentReportingScheduleofMajorProductLineRevenuesDetails">
        <link:definition>2438426 - Disclosure - Segment Reporting (Schedule of Major Product Line Revenues) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentReportingScheduleofAutomotiveCustomersIndividuallyAccountedfor10orMoreofNetSalesDetails" roleURI="http://www.gentex.com/role/SegmentReportingScheduleofAutomotiveCustomersIndividuallyAccountedfor10orMoreofNetSalesDetails">
        <link:definition>2439427 - Disclosure - Segment Reporting (Schedule of Automotive Customers Individually Accounted for 10% or More of Net Sales) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="QuarterlyFinancialInformationUnaudited" roleURI="http://www.gentex.com/role/QuarterlyFinancialInformationUnaudited">
        <link:definition>2140108 - Disclosure - Quarterly Financial Information (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="QuarterlyFinancialInformationTables" roleURI="http://www.gentex.com/role/QuarterlyFinancialInformationTables">
        <link:definition>2341305 - Disclosure - Quarterly Financial Information (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="QuarterlyFinancialInformationDetails" roleURI="http://www.gentex.com/role/QuarterlyFinancialInformationDetails">
        <link:definition>2442428 - Disclosure - Quarterly Financial Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ComprehensiveIncome" roleURI="http://www.gentex.com/role/ComprehensiveIncome">
        <link:definition>2143109 - Disclosure - Comprehensive Income</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ComprehensiveIncomeTables" roleURI="http://www.gentex.com/role/ComprehensiveIncomeTables">
        <link:definition>2344306 - Disclosure - Comprehensive Income (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ComprehensiveIncomeAOCIRollforwardDetails" roleURI="http://www.gentex.com/role/ComprehensiveIncomeAOCIRollforwardDetails">
        <link:definition>2445429 - Disclosure - Comprehensive Income (AOCI Rollforward) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ComprehensiveIncomeReclassificationOutofAccumulatedOtherComprehensiveIncomeDetails" roleURI="http://www.gentex.com/role/ComprehensiveIncomeReclassificationOutofAccumulatedOtherComprehensiveIncomeDetails">
        <link:definition>2446430 - Disclosure - Comprehensive Income (Reclassification Out of Accumulated Other Comprehensive Income) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssets" roleURI="http://www.gentex.com/role/GoodwillandIntangibleAssets">
        <link:definition>2147110 - Disclosure - Goodwill and Intangible Assets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssetsTables" roleURI="http://www.gentex.com/role/GoodwillandIntangibleAssetsTables">
        <link:definition>2348307 - Disclosure - Goodwill and Intangible Assets (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssetsDetails" roleURI="http://www.gentex.com/role/GoodwillandIntangibleAssetsDetails">
        <link:definition>2449431 - Disclosure - Goodwill and Intangible Assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssetsScheduleofGoodwillDetails" roleURI="http://www.gentex.com/role/GoodwillandIntangibleAssetsScheduleofGoodwillDetails">
        <link:definition>2450432 - Disclosure - Goodwill and Intangible Assets (Schedule of Goodwill) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssetsScheduleofIntangibleAssetsDetails" roleURI="http://www.gentex.com/role/GoodwillandIntangibleAssetsScheduleofIntangibleAssetsDetails">
        <link:definition>2451433 - Disclosure - Goodwill and Intangible Assets (Schedule of Intangible Assets) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandIntangibleAssetsScheduleofIntangibleAssetsDetails_1" roleURI="http://www.gentex.com/role/GoodwillandIntangibleAssetsScheduleofIntangibleAssetsDetails_1">
        <link:definition>2451433 - Disclosure - Goodwill and Intangible Assets (Schedule of Intangible Assets) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Revenue" roleURI="http://www.gentex.com/role/Revenue">
        <link:definition>2152111 - Disclosure - Revenue</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueTables" roleURI="http://www.gentex.com/role/RevenueTables">
        <link:definition>2353308 - Disclosure - Revenue (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueDetails" roleURI="http://www.gentex.com/role/RevenueDetails">
        <link:definition>2454434 - Disclosure - Revenue (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Acquisitions" roleURI="http://www.gentex.com/role/Acquisitions">
        <link:definition>2155112 - Disclosure - Acquisitions</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsTables" roleURI="http://www.gentex.com/role/AcquisitionsTables">
        <link:definition>2356309 - Disclosure - Acquisitions (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsDetails" roleURI="http://www.gentex.com/role/AcquisitionsDetails">
        <link:definition>2457435 - Disclosure - Acquisitions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsScheduleofAssetsAcquiredandLiabilitiesAssumedDetails" roleURI="http://www.gentex.com/role/AcquisitionsScheduleofAssetsAcquiredandLiabilitiesAssumedDetails">
        <link:definition>2458436 - Disclosure - Acquisitions - Schedule of Assets Acquired and Liabilities Assumed (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:element id="gntx_GuardianOpticalTechnologiesMember" abstract="true" name="GuardianOpticalTechnologiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_ScheduleOfAllowanceForDoubtfulAccountsTableTextBlock" abstract="false" name="ScheduleOfAllowanceForDoubtfulAccountsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="gntx_NumeratorsAbstract" abstract="true" name="NumeratorsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gntx_SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofPlans" abstract="false" name="SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofPlans" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="gntx_ScheduleofFiniteLivedandIndefiniteLivedIntangibleAssetsTable" abstract="true" name="ScheduleofFiniteLivedandIndefiniteLivedIntangibleAssetsTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="gntx_ShareBasedCompensationArrangementByShareBasedPaymentAwardRestrictedStockGranted" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardRestrictedStockGranted" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="gntx_LesseeOperatingLeaseLiabilityToBePaidDueAfterYearFour" abstract="false" name="LesseeOperatingLeaseLiabilityToBePaidDueAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gntx_ShareBasedCompensationRestrictedPeriod" abstract="false" name="ShareBasedCompensationRestrictedPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="gntx_FireProtectionProductsMember" abstract="true" name="FireProtectionProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_DenominatorsAbstract" abstract="true" name="DenominatorsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gntx_OtherProductsMember" abstract="true" name="OtherProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_DeferredCompensationArrangementwithIndividualVestingPercentage" abstract="false" name="DeferredCompensationArrangementwithIndividualVestingPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="gntx_RestrictedStockConversionRatio" abstract="false" name="RestrictedStockConversionRatio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="gntx_AutomotiveSegmentMember" abstract="true" name="AutomotiveSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_GainOnDispositionOnAssets" abstract="false" name="GainOnDispositionOnAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gntx_SwingLoansMember" abstract="true" name="SwingLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_OtherCountriesMember" abstract="true" name="OtherCountriesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_LossOnDispositionOfAssets" abstract="false" name="LossOnDispositionOfAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gntx_EffectiveIncomeTaxRateReconciliationIncreaseReductioninReserveforUncertainTaxProvisions" abstract="false" name="EffectiveIncomeTaxRateReconciliationIncreaseReductioninReserveforUncertainTaxProvisions" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="gntx_AutomotiveMirrorsElectronicsMember" abstract="true" name="AutomotiveMirrorsElectronicsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_AutomotiveProductsMember" abstract="true" name="AutomotiveProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_AirCraftglassMember" abstract="true" name="AirCraftglassMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_NanofiberProductsMember" abstract="true" name="NanofiberProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_AllowanceForDoubtfulAccountsPolicyTextBlock" abstract="false" name="AllowanceForDoubtfulAccountsPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="gntx_EquitySecuritiesWithoutReadilyDeterminableFairValueAcquisitionAdjustmentAnnualAmount" abstract="false" name="EquitySecuritiesWithoutReadilyDeterminableFairValueAcquisitionAdjustmentAnnualAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gntx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfNonQualifiedStockOptions" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfNonQualifiedStockOptions" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="gntx_DebtInstrumentAdditionalBorrowingsAvailableFaceAmount" abstract="false" name="DebtInstrumentAdditionalBorrowingsAvailableFaceAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gntx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfRestrictedStock" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfRestrictedStock" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="gntx_SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofSharesIssuedNetOfSharesCanceledOrExpired" abstract="false" name="SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofSharesIssuedNetOfSharesCanceledOrExpired" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="gntx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrants" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrants" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="gntx_VaporsensIncMember" abstract="true" name="VaporsensIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_NonQualifiedStockOptionsConversionRatio" abstract="false" name="NonQualifiedStockOptionsConversionRatio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="gntx_PatentsandOtherIntangibleAssetsMember" abstract="true" name="PatentsandOtherIntangibleAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_DeferredTaxLiabilitiesDeferredExpenseExcessTaxOverBookDepreciation" abstract="false" name="DeferredTaxLiabilitiesDeferredExpenseExcessTaxOverBookDepreciation" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gntx_OmnibusIncentivePlanMember" abstract="true" name="OmnibusIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_PercentageNetSalesInvoicedAndPaidInForeignCurrencies" abstract="false" name="PercentageNetSalesInvoicedAndPaidInForeignCurrencies" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="gntx_ScheduleofFiniteLivedandIndefiniteLivedIntangibleAssetsLineItems" abstract="true" name="ScheduleofFiniteLivedandIndefiniteLivedIntangibleAssetsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gntx_TwoYearMember" abstract="true" name="TwoYearMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_ActivityInAvailableForSaleSecuritiesAbstract" abstract="true" name="ActivityInAvailableForSaleSecuritiesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gntx_ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformanceSharesGranted" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardPerformanceSharesGranted" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="gntx_A1YearMember" abstract="true" name="A1YearMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_ThreeYearsMember" abstract="true" name="ThreeYearsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_PerformanceSharesConversionRatio" abstract="false" name="PerformanceSharesConversionRatio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="gntx_HomeLinkModulesMember" abstract="true" name="HomeLinkModulesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_RestrictedStockPlanMember" abstract="true" name="RestrictedStockPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonQualifiedStockOptionsGranted" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonQualifiedStockOptionsGranted" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="gntx_AutomotiveMirrorsMember" abstract="true" name="AutomotiveMirrorsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_VolkswagenGroupMember" abstract="true" name="VolkswagenGroupMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_AllowanceForObsoleteAndSlowMovingInventories" abstract="false" name="AllowanceForObsoleteAndSlowMovingInventories" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gntx_DimmableAircraftWindowsMember" abstract="true" name="DimmableAircraftWindowsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountRecognizedAsCompensationExpense" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountRecognizedAsCompensationExpense" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="gntx_AccountPayableCapitalExpenditures" abstract="false" name="AccountPayableCapitalExpenditures" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gntx_AuditInformationAbstract" abstract="true" name="AuditInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gntx_DeferredCompensationArrangementWithIndividualTrancheTwoMember" abstract="true" name="DeferredCompensationArrangementWithIndividualTrancheTwoMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_DeferredCompensationArrangementWithIndividualTrancheOneMember" abstract="true" name="DeferredCompensationArrangementWithIndividualTrancheOneMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_ToyotaMotorCompanyMember" abstract="true" name="ToyotaMotorCompanyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_SummaryofSignificantAccountingandReportingPoliciesTable" abstract="true" name="SummaryofSignificantAccountingandReportingPoliciesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="gntx_RevenuefromContractwithCustomerPaymentTerms" abstract="false" name="RevenuefromContractwithCustomerPaymentTerms" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="gntx_GeneralMotorsCompanyMember" abstract="true" name="GeneralMotorsCompanyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_PatentandOtherAssetsNet" abstract="false" name="PatentandOtherAssetsNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gntx_WindowsProductsMember" abstract="true" name="WindowsProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_NumberOfCustomersWhichIndividuallyAccountedFor10PercentOrMoreOfNetSales" abstract="false" name="NumberOfCustomersWhichIndividuallyAccountedFor10PercentOrMoreOfNetSales" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="gntx_SummaryOfSharesUnder2019OmnibusIncentivePlanTableTextBlock" abstract="false" name="SummaryOfSharesUnder2019OmnibusIncentivePlanTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="gntx_AutomotiveProductsSegmentMember" abstract="true" name="AutomotiveProductsSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfPerformanceShares" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfPerformanceShares" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="gntx_FiveYearsMember" abstract="true" name="FiveYearsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_FourYearMember" abstract="true" name="FourYearMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_ArgilIncMember" abstract="true" name="ArgilIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_EmployeeStockOptionPlanMember" abstract="true" name="EmployeeStockOptionPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_PatentAndOtherAssetsNetMember" abstract="true" name="PatentAndOtherAssetsNetMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_AirCraftGlassMember" abstract="true" name="AirCraftGlassMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesGrantedTotal" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardSharesGrantedTotal" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="gntx_BusinessAcquisitionAgreementValue" abstract="false" name="BusinessAcquisitionAgreementValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gntx_HomeLinkMember" abstract="true" name="HomeLinkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_SelfInsurancePolicyTextBlock" abstract="false" name="SelfInsurancePolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="gntx_DebtSecuritiesAvailableForSaleMaturityAllocatedAndSingleMaturityDateAfterFiveYearsFairValue" abstract="false" name="DebtSecuritiesAvailableForSaleMaturityAllocatedAndSingleMaturityDateAfterFiveYearsFairValue" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gntx_EmployeeStockPurchasePlanMember" abstract="true" name="EmployeeStockPurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_SummaryOfSignificantAccountingAndReportingPoliciesLineItems" abstract="true" name="SummaryOfSignificantAccountingAndReportingPoliciesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
</xs:schema>
