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  <xsd:element id="gntx_EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount" name="EffectiveIncomeTaxRateReconciliationSharebasedCompensationExcessTaxBenefitAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration" />
  <xsd:element id="gntx_EffectofOnePercentagePointIncreaseonBorrowingRatetoInterestExpense" name="EffectofOnePercentagePointIncreaseonBorrowingRatetoInterestExpense" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="gntx_EmployeeStockOptionPlanMember" name="EmployeeStockOptionPlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gntx_EmployeeStockPurchasePlanMember" name="EmployeeStockPurchasePlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gntx_HomeLinkMember" name="HomeLinkMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="gntx_IncreaseInCashDividendRate" name="IncreaseInCashDividendRate" nillable="true" substitutionGroup="xbrli:item" type="num:perShareItemType" xbrli:periodType="duration" />
  <xsd:element id="gntx_NetDecreaseinCommonStockSharesfromSharesIssuedinShareBasedCompensationandSharesRepurchased" name="NetDecreaseinCommonStockSharesfromSharesIssuedinShareBasedCompensationandSharesRepurchased" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gntx_NonEmployeeDirectorStockOptionPlanMember" name="NonEmployeeDirectorStockOptionPlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gntx_NumeratorsAbstract" name="NumeratorsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gntx_OtherNetMember" name="OtherNetMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element id="gntx_PatentsandOtherAssetsNet" name="PatentsandOtherAssetsNet" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="gntx_PatentsandOtherIntangibleAssetsMember" name="PatentsandOtherIntangibleAssetsMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gntx_RestrictedStockPlanMember" name="RestrictedStockPlanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gntx_ScheduleofFiniteLivedandIndefiniteLivedIntangibleAssetsLineItems" name="ScheduleofFiniteLivedandIndefiniteLivedIntangibleAssetsLineItems" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gntx_ScheduleofFiniteLivedandIndefiniteLivedIntangibleAssetsTable" name="ScheduleofFiniteLivedandIndefiniteLivedIntangibleAssetsTable" nillable="true" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType" xbrli:periodType="duration" />
  <xsd:element id="gntx_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountRecognizedAsCompensationExpense" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountRecognizedAsCompensationExpense" nillable="true" substitutionGroup="xbrli:item" type="num:percentItemType" xbrli:periodType="duration" />
  <xsd:element id="gntx_ShareBasedCompensationRestrictedPeriod" name="ShareBasedCompensationRestrictedPeriod" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration" />
  <xsd:element id="gntx_SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofPlans" name="SharebasedCompensationArrangementbySharebasedPaymentAwardNumberofPlans" nillable="true" substitutionGroup="xbrli:item" type="xbrli:integerItemType" xbrli:periodType="instant" />
  <xsd:element abstract="true" id="gntx_SwingLoansMember" name="SwingLoansMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gntx_TermLoanMember" name="TermLoanMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
  <xsd:element abstract="true" id="gntx_TermLoanandRevolvingFacilityMember" name="TermLoanandRevolvingFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="nonnum:domainItemType" xbrli:periodType="duration" />
</xsd:schema>
