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  <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_ShareBasedCompensationRestrictedPeriod" abstract="false" name="ShareBasedCompensationRestrictedPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="gntx_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountRecognizedAsCompensationExpense" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountRecognizedAsCompensationExpense" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="gntx_NonQualifiedStockOptionMember" abstract="true" name="NonQualifiedStockOptionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_ShareBasedCompensationArrangementByShareBasedAwardGrantedInPeriod" abstract="false" name="ShareBasedCompensationArrangementByShareBasedAwardGrantedInPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="gntx_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsConversionRate" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsConversionRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="gntx_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentConversionRate" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentConversionRate" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="gntx_OneYearMember" abstract="true" name="OneYearMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_TwoYearMember" abstract="true" name="TwoYearMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_ThreeYearsMember" abstract="true" name="ThreeYearsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_FourYearsMember" abstract="true" name="FourYearsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_FiveYearsMember" abstract="true" name="FiveYearsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_A2022EmployeeStockPurchasePlanMember" abstract="true" name="A2022EmployeeStockPurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_PriorEmployeeStockPurchasePlanMember" abstract="true" name="PriorEmployeeStockPurchasePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_AutomotiveProductsSegmentMember" abstract="true" name="AutomotiveProductsSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_SegmentConcentrationRiskMember" abstract="true" name="SegmentConcentrationRiskMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_PercentageOfNetSalesInvoicedAndPaidInForeignCurrencies" abstract="false" name="PercentageOfNetSalesInvoicedAndPaidInForeignCurrencies" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="gntx_AutomotiveMirrorsMember" abstract="true" name="AutomotiveMirrorsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_HomeLinkModulesMember" abstract="true" name="HomeLinkModulesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_OtherProductsMember" abstract="true" name="OtherProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_ToyotaMotorCompanyMember" abstract="true" name="ToyotaMotorCompanyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_VolkswagenGroupMember" abstract="true" name="VolkswagenGroupMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_GeneralMotorsCompanyMember" abstract="true" name="GeneralMotorsCompanyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_NumberOfMajorCustomers" abstract="false" name="NumberOfMajorCustomers" 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_HomeLinkMember" abstract="true" name="HomeLinkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_VaporsensIncMember" abstract="true" name="VaporsensIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_AirCraftGlassProductionBVMember" abstract="true" name="AirCraftGlassProductionBVMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_ArgilIncMember" abstract="true" name="ArgilIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_GuardianOpticalTechnologiesMember" abstract="true" name="GuardianOpticalTechnologiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_ESightCorporationMember" abstract="true" name="ESightCorporationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_GalvanEyesLLCMember" abstract="true" name="GalvanEyesLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_OtherSegmentMember" abstract="true" name="OtherSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_AutomotiveSegmentMember" abstract="true" name="AutomotiveSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_PatentsAndOtherIntangibleAssetsMember" abstract="true" name="PatentsAndOtherIntangibleAssetsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_ScheduleofFiniteLivedandIndefiniteLivedIntangibleAssetsLineItems" abstract="true" name="ScheduleofFiniteLivedandIndefiniteLivedIntangibleAssetsLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="gntx_BioCenturionMember" abstract="true" name="BioCenturionMember" 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-types1:domainItemType"/>
  <xs:element id="gntx_AutomotiveProductsMember" abstract="true" name="AutomotiveProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_AutomotiveMirrorsAndElectronicsMember" abstract="true" name="AutomotiveMirrorsAndElectronicsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_FireProtectionProductsMember" abstract="true" name="FireProtectionProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_WindowsProductsMember" abstract="true" name="WindowsProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_NanofiberProductsMember" abstract="true" name="NanofiberProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_MedicalMember" abstract="true" name="MedicalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_BiometricsMember" abstract="true" name="BiometricsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_DimmableAircraftWindowsMember" abstract="true" name="DimmableAircraftWindowsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="gntx_BioCenturionJointVentureMember" abstract="true" name="BioCenturionJointVentureMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_RevenueFromContractWithCustomerPaymentTerms" abstract="false" name="RevenueFromContractWithCustomerPaymentTerms" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="gntx_BusinessAcquisitionOwnershipInterestInAcquireeHeldPriorToAcquisition" abstract="false" name="BusinessAcquisitionOwnershipInterestInAcquireeHeldPriorToAcquisition" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="gntx_OwnershipInterestPercentage" abstract="false" name="OwnershipInterestPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="gntx_GalvanEyesLLCAndVOXXInternationalCorporationMember" abstract="true" name="GalvanEyesLLCAndVOXXInternationalCorporationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="gntx_BusinessCombinationBusinessCombinationContingentConsiderationArrangementsTerm" abstract="false" name="BusinessCombinationBusinessCombinationContingentConsiderationArrangementsTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="gntx_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseRightOfUseAsset" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseRightOfUseAsset" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="gntx_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsIncludingGoodwill" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedAssetsIncludingGoodwill" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
