<ownershipDocument>
    <schemaVersion>X0201</schemaVersion>

    <documentType>4</documentType>
<periodOfReport>2003-11-10</periodOfReport>
<notSubjectToSection16>0</notSubjectToSection16>
    <issuer>
        <issuerCik>0000039648</issuerCik>
        <issuerName>G&amp;K SERVICES INC</issuerName>
        <issuerTradingSymbol>GKSR</issuerTradingSymbol>
</issuer>
<reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0000900584</rptOwnerCik>
            <rptOwnerName>FINK RICHARD</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>G&amp;K SERVICES, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>5995 OPUS PARKWAY, SUITE 500</rptOwnerStreet2>
            <rptOwnerCity>MINNETONKA</rptOwnerCity>
            <rptOwnerState>MN</rptOwnerState>
            <rptOwnerZipCode>55343</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector>
<isOfficer>1</isOfficer>
<isTenPercentOwner>1</isTenPercentOwner>
<isOther>0</isOther>
<officerTitle>Chairman of the Board</officerTitle>
<otherText></otherText>
</reportingOwnerRelationship>
</reportingOwner>
<nonDerivativeTable><nonDerivativeTransaction><securityTitle><value>Class A Common Stock</value>
</securityTitle>
<transactionDate><value>2003-11-10</value>
</transactionDate>
<transactionCoding><transactionFormType>4</transactionFormType>
<transactionCode>S</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionAmounts><transactionShares><value>1000</value>
</transactionShares>
<transactionPricePerShare><value>35.7</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode><value>D</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts><sharesOwnedFollowingTransaction><value>17906</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature><directOrIndirectOwnership><value>I</value>
</directOrIndirectOwnership>
<natureOfOwnership><value>By the Richard &amp; Beverly Fink Family Foundation</value>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeTransaction><securityTitle><value>Class A Common Stock</value>
</securityTitle>
<transactionDate><value>2003-11-11</value>
</transactionDate>
<transactionCoding><transactionFormType>4</transactionFormType>
<transactionCode>S</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionAmounts><transactionShares><value>1000</value>
</transactionShares>
<transactionPricePerShare><value>35.6</value>
</transactionPricePerShare>
<transactionAcquiredDisposedCode><value>D</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts><sharesOwnedFollowingTransaction><value>16906</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature><directOrIndirectOwnership><value>I</value>
</directOrIndirectOwnership>
<natureOfOwnership><value>By the Richard &amp; Beverly Fink Family Foundation</value>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeTransaction><securityTitle><value>Class B Common Stock</value>
</securityTitle>
<transactionDate><value>2003-09-30</value>
</transactionDate>
<transactionCoding><transactionFormType>5</transactionFormType>
<transactionCode>G</transactionCode>
<equitySwapInvolved>0</equitySwapInvolved>
</transactionCoding>
<transactionTimeliness><value>E</value>
</transactionTimeliness>
<transactionAmounts><transactionShares><value>7098</value>
</transactionShares>
<transactionPricePerShare><footnoteId id="F1"></footnoteId>
</transactionPricePerShare>
<transactionAcquiredDisposedCode><value>A</value>
</transactionAcquiredDisposedCode>
</transactionAmounts>
<postTransactionAmounts><sharesOwnedFollowingTransaction><value>971889</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature><directOrIndirectOwnership><value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeTransaction>
<nonDerivativeHolding><securityTitle><value>Class A Common Stock</value>
</securityTitle>
<postTransactionAmounts><sharesOwnedFollowingTransaction><value>56033</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature><directOrIndirectOwnership><value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</nonDerivativeHolding>
<nonDerivativeHolding><securityTitle><value>Class A Common Stock</value>
</securityTitle>
<postTransactionAmounts><sharesOwnedFollowingTransaction><value>7700</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature><directOrIndirectOwnership><value>I</value>
</directOrIndirectOwnership>
<natureOfOwnership><value>By Spouse</value>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeHolding>
<nonDerivativeHolding><securityTitle><value>Class A Common Stock</value>
</securityTitle>
<postTransactionAmounts><sharesOwnedFollowingTransaction><value>78226</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature><directOrIndirectOwnership><value>I</value>
</directOrIndirectOwnership>
<natureOfOwnership><value>As Co-Trustee of the David Robert Fink 1992 Trust</value>
</natureOfOwnership>
</ownershipNature>
</nonDerivativeHolding>
</nonDerivativeTable>
<derivativeTable><derivativeHolding><securityTitle><value>Stock Option</value>
</securityTitle>
<conversionOrExercisePrice><value>46</value>
</conversionOrExercisePrice>
<exerciseDate><value>2001-09-01</value>
</exerciseDate>
<expirationDate><value>2008-09-01</value>
</expirationDate>
<underlyingSecurity><underlyingSecurityTitle><value>Class A Common Stock</value>
</underlyingSecurityTitle>
<underlyingSecurityShares><value>3850</value>
</underlyingSecurityShares>
</underlyingSecurity>
<postTransactionAmounts><sharesOwnedFollowingTransaction><value>3850</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature><directOrIndirectOwnership><value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</derivativeHolding>
<derivativeHolding><securityTitle><value>Stock Option</value>
</securityTitle>
<conversionOrExercisePrice><value>41.5625</value>
</conversionOrExercisePrice>
<exerciseDate><value>2002-09-01</value>
</exerciseDate>
<expirationDate><value>2009-09-01</value>
</expirationDate>
<underlyingSecurity><underlyingSecurityTitle><value>Class A Common Stock</value>
</underlyingSecurityTitle>
<underlyingSecurityShares><value>4259</value>
</underlyingSecurityShares>
</underlyingSecurity>
<postTransactionAmounts><sharesOwnedFollowingTransaction><value>4259</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature><directOrIndirectOwnership><value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</derivativeHolding>
<derivativeHolding><securityTitle><value>Stock Option</value>
</securityTitle>
<conversionOrExercisePrice><value>25</value>
</conversionOrExercisePrice>
<exerciseDate><value>2003-05-25</value>
</exerciseDate>
<expirationDate><value>2010-05-25</value>
</expirationDate>
<underlyingSecurity><underlyingSecurityTitle><value>Class A Common Stock</value>
</underlyingSecurityTitle>
<underlyingSecurityShares><value>12500</value>
</underlyingSecurityShares>
</underlyingSecurity>
<postTransactionAmounts><sharesOwnedFollowingTransaction><value>12500</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature><directOrIndirectOwnership><value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</derivativeHolding>
<derivativeHolding><securityTitle><value>Class A Common Stock</value>
</securityTitle>
<conversionOrExercisePrice><value>28.5</value>
</conversionOrExercisePrice>
<exerciseDate><value>2003-09-01</value>
</exerciseDate>
<expirationDate><value>2010-09-01</value>
</expirationDate>
<underlyingSecurity><underlyingSecurityTitle><value>Class A Common Stock</value>
</underlyingSecurityTitle>
<underlyingSecurityShares><value>6456</value>
</underlyingSecurityShares>
</underlyingSecurity>
<postTransactionAmounts><sharesOwnedFollowingTransaction><value>6456</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature><directOrIndirectOwnership><value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</derivativeHolding>
<derivativeHolding><securityTitle><value>Stock Option</value>
</securityTitle>
<conversionOrExercisePrice><value>27.95</value>
</conversionOrExercisePrice>
<exerciseDate><value>2004-09-01</value>
</exerciseDate>
<expirationDate><value>2011-09-01</value>
</expirationDate>
<underlyingSecurity><underlyingSecurityTitle><value>Class A Common Stock</value>
</underlyingSecurityTitle>
<underlyingSecurityShares><value>6887</value>
</underlyingSecurityShares>
</underlyingSecurity>
<postTransactionAmounts><sharesOwnedFollowingTransaction><value>6887</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature><directOrIndirectOwnership><value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</derivativeHolding>
<derivativeHolding><securityTitle><value>Stock Option</value>
</securityTitle>
<conversionOrExercisePrice><value>35.4</value>
</conversionOrExercisePrice>
<exerciseDate><footnoteId id="F2"></footnoteId>
</exerciseDate>
<expirationDate><value>2013-01-02</value>
</expirationDate>
<underlyingSecurity><underlyingSecurityTitle><value>Class A Common Stock</value>
</underlyingSecurityTitle>
<underlyingSecurityShares><value>12300</value>
</underlyingSecurityShares>
</underlyingSecurity>
<postTransactionAmounts><sharesOwnedFollowingTransaction><value>12300</value>
</sharesOwnedFollowingTransaction>
</postTransactionAmounts>
<ownershipNature><directOrIndirectOwnership><value>D</value>
</directOrIndirectOwnership>
</ownershipNature>
</derivativeHolding>
</derivativeTable>
<footnotes><footnote id="F1">Represents a gift from the Family Limited Partnership.  Price is not applicable.</footnote>
<footnote id="F2">4,100 shares each vest on 1/2/04, 1/2/05 and 1/2/06.</footnote>
</footnotes>
<ownerSignature><signatureName>/s/ Richard Fink</signatureName>
<signatureDate>2003-11-12</signatureDate>
</ownerSignature>
</ownershipDocument>

