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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

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                                    FORM 8-K

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                                 CURRENT REPORT
                       Pursuant to Section 13 or 15(d) of
                      the Securities Exchange Act of 1934

       Date of Report (Date of earliest event reported): October 23, 2007

                                 GSI GROUP INC.
             (Exact name of registrant as specified in its charter)

                              New Brunswick, Canada
                 (State or other jurisdiction of incorporation)

                000-25705                             98-0110412
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       (Commission File Number)             (I.R.S. Employer Identification No.)

                 39 Manning Road, Billerica, Massachusetts 01821
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          (Address of principal executive offices, including zip code)

                                 (978) 439-5511
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              (Registrant's telephone number, including area code)

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Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions (see General Instruction A.2. below):

|_| Written communications pursuant to Rule 425 under the Securities Act (17 CFR
220.425)

|_| Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
240.14a-12)

|_| Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
Act (17 CFR 240.14d-2(b))

|_| Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
Act (17 CFR 240.13e-4(c))
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ITEM 2.02.  RESULTS OF OPERATIONS AND FINANCIAL CONDITION.

      On October 23, 2007, GSI Group Inc. (the "Company") issued a press release
announcing  its  financial  position and results of operations as of and for the
fiscal quarter ended September 28, 2007. A copy of the press release is attached
as Exhibit 99.1 to this Current  Report on Form 8-K and  incorporated  herein by
reference.

ITEM 9.01.        FINANCIAL STATEMENTS AND EXHIBITS.

      (a)   Financial Statements of Businesses Acquired.

            Not applicable.

      (b)   Pro Forma Financial Information.

            Not applicable.

      (c)   Shell Company Transactions.

            Not applicable.

      (d)   Exhibits.

            99.1  Press Release issued October 23, 2007

      The  information  in this Current  Report on Form 8-K (including the press
release  attached  as  Exhibit  99.1  hereto)  shall not be deemed  "filed"  for
purposes oft 6 0 Section 18 of the  Securities  Exchange Act of 1934, as amended
(the "Exchange  Act") or otherwise  subject to the  liabilities of that section,
nor shall it be deemed  incorporated  by  reference  into any  filing  under the
Securities  Act of 1933,  as amended,  or the Exchange  Act,  regardless  of any
general incorporation language in such filing, unless the Company expressly sets
forth in such future filing that such information is to be considered "filed" or
incorporated by reference therein.



                                    SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended,
the  Registrant  has duly  caused  this report to be signed on its behalf by the
undersigned hereunto duly authorized.

                                              GSI GROUP INC.
                                              (Registrant)

Date:  October 23, 2007                       By: /s/  Robert L. Bowen
                                                  -------------------------
                                                  Robert L. Bowen
                                                  Vice President and
                                                  Chief Financial Officer



                                  EXHIBIT INDEX

        Exhibit No.             Description
        -----------             -----------

             99.1               Press Release issued October 23, 2007.