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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 LZWrT1TK5Ib793FZ53/wnzh5R+TdnMKlCzZZb+uHgWcaVOsj98Yjb7Cz0z6v7YOC
 mOZfkl/9Aqbb0IW6pLiBcQ==

<SEC-DOCUMENT>0001197817-10-000021.txt : 20100907
<SEC-HEADER>0001197817-10-000021.hdr.sgml : 20100906
<ACCEPTANCE-DATETIME>20100907182750
ACCESSION NUMBER:		0001197817-10-000021
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20100902
FILED AS OF DATE:		20100907
DATE AS OF CHANGE:		20100907

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			GSI GROUP INC
		CENTRAL INDEX KEY:			0001076930
		STANDARD INDUSTRIAL CLASSIFICATION:	MISCELLANEOUS ELECTRICAL MACHINERY, EQUIPMENT & SUPPLIES [3690]
		IRS NUMBER:				980110412
		STATE OF INCORPORATION:			A3
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		125 MIDDLESEX TURNPIKE
		STREET 2:		.
		CITY:			BEDFORD
		STATE:			MA
		ZIP:			01730
		BUSINESS PHONE:		781-266-5700

	MAIL ADDRESS:	
		STREET 1:		125 MIDDLESEX TURNPIKE
		STREET 2:		.
		CITY:			BEDFORD
		STATE:			MA
		ZIP:			01730

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	GSI LUMONICS INC
		DATE OF NAME CHANGE:	19990401

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	GSI LUMONICS
		DATE OF NAME CHANGE:	19990331

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	LUMONICS INC
		DATE OF NAME CHANGE:	19990115

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			POND BYRON O
		CENTRAL INDEX KEY:			0001067689
		STANDARD INDUSTRIAL CLASSIFICATION:	TIRES AND INNER TUBES [3011]
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-25705
		FILM NUMBER:		101060857

	MAIL ADDRESS:	
		STREET 1:		C/O COOPER TIRE & RUBBER COMPANY
		STREET 2:		LIMA & WESTERN AVENUES
		CITY:			FINDLAY
		STATE:			OH
		ZIP:			45868
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-09-02</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0001076930</issuerCik>
        <issuerName>GSI GROUP INC</issuerName>
        <issuerTradingSymbol>LASR.PK</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001067689</rptOwnerCik>
            <rptOwnerName>POND BYRON O</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>C/O GSI GROUP CORPORATION</rptOwnerStreet1>
            <rptOwnerStreet2>125 MIDDLESEX TURNPIKE</rptOwnerStreet2>
            <rptOwnerCity>BEDFORD</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>01730</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F1"/>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2010-09-02</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>34723</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F1"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>34723</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>34723</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">As of the date the reporting person ceases to be a director of the issuer, each Deferred Stock Unit will convert into a share of issuer common stock.</footnote>
    </footnotes>

    <remarks>Exhibit List
Exhibit 24 - Power of Attorney</remarks>

    <ownerSignature>
        <signatureName>Anthony J. Bellantuoni, Attorney In Fact</signatureName>
        <signatureDate>2010-09-07</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>pond.txt
<DESCRIPTION>POWER OF ATTORNEY
<TEXT>
POWER OF ATTORNEY




      Know all by these presents that the undersigned
hereby constitutes and appoints, Sergio Edelstein and
Anthony J. Bellantuoni as his true and lawful
attorneys-in-fact to:
(1)	execute for and on behalf of the
undersigned Forms 3, 4 and 5 in
accordance with Section 16(a) of the
Securities Exchange Act of 1934, as
amended, and the rules thereunder;
(2)	do and perform any and all acts for and
on behalf of the undersigned which may
be necessary or desirable to complete
the execution of any such Form 3, 4 and
5 and timely filing of such forms with
the United States Securities and
Exchange Commission and any other
authority; and
(3)	take any other action of any type
whatsoever in connection with the
foregoing which, in the opinion of such
attorneys-in-fact, may be of benefit
to, in the best interest of, or legally
required by, the undersigned, it being
understood that the documents executed
by such attorneys-in-fact on behalf of
the undersigned pursuant to this Power
of Attorney shall be in such form and
shall contain such terms and conditions
as such attorneys-in-fact may approve
in their discretion.
      The undersigned hereby grants to each attorney-
in-fact, individually, full power and authority to do
and perform all and every act and thing whatsoever
requisite, necessary and proper to be done in the
exercise of any of the rights and powers herein
granted, as fully to all intents and purposes as each
attorney-in-fact might or could do if personally
present, with full power of substitution or
revocation, hereby ratifying and confirming that each
attorney-in-fact, or his substitute or substitutes,
shall lawfully do or cause to be done by virtue of
this power of attorney and the rights and powers
herein granted.  The undersigned acknowledges that the
foregoing attorneys-in-fact, in serving in such
capacity at the request of the undersigned, are not
assuming any of the undersigned's responsibilities to
comply with Section 16 of the Securities Exchange Act
of 1934, as amended.
      IN WITNESS WHEREOF, the undersigned has caused
this Power of Attorney to be executed as of this 28
day of July, 2009.


	s/ Byron O. Pond
	Signature

</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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