<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-02-13</periodOfReport>

    <notSubjectToSection16>true</notSubjectToSection16>

    <issuer>
        <issuerCik>0001327098</issuerCik>
        <issuerName>Golf Galaxy, Inc.</issuerName>
        <issuerTradingSymbol>GGXY</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001216549</rptOwnerCik>
            <rptOwnerName>MULLIGAN WILLIAM C</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O PRIMUS VENTURE PARTNERS, INC.</rptOwnerStreet1>
            <rptOwnerStreet2>5900 LANDERBROOK DRIVE SUITE 200</rptOwnerStreet2>
            <rptOwnerCity>CLEVELAND</rptOwnerCity>
            <rptOwnerState>OH</rptOwnerState>
            <rptOwnerZipCode>44124</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>true</isDirector>
            <isOfficer>false</isOfficer>
            <isTenPercentOwner>false</isTenPercentOwner>
            <isOther>false</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Golf Galaxy Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-02-13</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>709491</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>18.82</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Shares held by Primus Capital Fund IV L.P. (PCF IV LP&quot;)</value>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Golf Galaxy Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-02-13</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>29562</value>
                    <footnoteId id="F3"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>18.82</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>Shares held by Primus Executive Fund L.P. (&quot;PEF LP&quot;)</value>
                    <footnoteId id="F4"/>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>18.77</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2007-02-13</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>D</transactionCode>
                <equitySwapInvolved>false</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0.05</value>
                    <footnoteId id="F5"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>D</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <value>2006-02-08</value>
                <footnoteId id="F6"/>
            </exerciseDate>
            <expirationDate>
                <value>2016-02-08</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Golf Galaxy Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>1500</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Disposed of pursuant to the Agreement and Plan of Merger, dated as of November 13, 2006, among the Issuer, Yankees Acquisition Corp. and Dick's Sporting Goods, Inc. (&quot;Merger Agreement&quot;) in exchange for the right to receive $18.82 per share in cash, without interest.</footnote>
        <footnote id="F2">The shares are held by PCF IV LP. The sole general partner of PCF IV LP is Primus Venture Partners IV Limited Partnership (&quot;PVP IV LP&quot;). The sole general partner of PVP IV LP is Primus Venture Partners IV, Inc. (&quot;PVP IV Inc.&quot;). Mr Mulligan, a director of PVP IV Inc., shares voting power and investment power with respect to the shares with four other directors of PVP IV Inc. Mr. Mulligan disclaims beneficial ownership of the shares held by PCF IV LP except to the extent of his pecuniary interest therein.</footnote>
        <footnote id="F3">Disposed of pursuant to the Merger Agreement in exchange for the right to receive $18.82 per share in cash, without interest.</footnote>
        <footnote id="F4">The shares are held by PEF LP. The sole general partner of PEF LP is PVP IV LP. The sole general partner of PVP IV LP is PVP IV Inc. Mr. Mulligan, a director of PVP IV Inc., shares voting power and investment power with respect to the shares with four other directors of PVP IV Inc. Mr. Mulligan disclaims beneficial ownership of the shares held by PEF LP except to the extent of his pecuniary interest therein.</footnote>
        <footnote id="F5">At the election of the reporting person and effective at the time of the closing of the transactions contemplated by the Merger Agreement, each option to acquire shares of the Issuer's common stock was converted into the right to receive a cash payment equal to the difference between the merger consideration of $18.82 and the exercise price of the option.</footnote>
        <footnote id="F6">The date indicated is the grant date and the options were 100% vested upon date of grant.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Richard C. Nordvold Attorney-in-fact for William C. Mulligan</signatureName>
        <signatureDate>2007-02-13</signatureDate>
    </ownerSignature>
</ownershipDocument>
