UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              WASHINGTON, DC 20549

                                   FORM 12B-25

                           NOTIFICATION OF LATE FILING

     Commission  File  Number:  333-43089

     (Check  One):   [X] Form 10-K    [_] Form 11-K    [_] Form 20-F    [_] Form
10-Q
[_]  Form  N-SAR   [_]  Form  N-CSR

For  period  ended  December  31,  2004

[_]  Transition  Report  on  Form  10-K

[_]  Transition  Report  on  Form  20-F

[_]  Transition  Report  on  Form  11-K

[_]  Transition  Report  on  Form  10-Q

[_]  Transition  Report  on  Form  N-SAR

For  the  transition  period  ended

Read  Attached  Instruction  Sheet Before Preparing Form.  Please Print or Type.

Nothing  in  this  form  shall  be  construed  to  imply that the Commission has
verified  any  information  contained  herein.

     If  the  notification  relates  to  a  portion of the filing checked above,
identify  the  item(s)  to  which  the  notification  relates:


                                     PART I
                             REGISTRANT INFORMATION

     Full  name  of  registrant   The  GSI  Group,  Inc.
                                ------------------------

     Former  name  if  applicable

     Address  of  principal  executive  office  (Street  and number)   1004 East
                                                                     -----------
Illinois  Street
     -----------

City,  state  and  zip  code    Assumption,  Illinois  62510
                             -------------------------------
                                     PART II
                             RULE 12B-25(B) AND (C)

     If  the  subject  report  could not be filed without unreasonable effort or
expense  and  the  registrant  seeks  relief  pursuant  to  Rule  12b-25(b), the
following  should  be  completed.  (Check  box  if  appropriate.)

(a)  The  reasons  described in reasonable detail in Part III of this form could
not  be  eliminated  without  unreasonable  effort  or  expense;

(b)  The  subject  annual  report, semi-annual report, transition report on Form
10-K, Form 20-F, Form 11-K or Form N-SAR, or portion thereof will be filed on or
before  the  15th calendar day following the prescribed due date; or the subject
quarterly  report  or
[X]     transition  report  on Form 10-Q, or portion thereof will be filed on or
before  the  fifth  calendar  day  following  the  prescribed  due  date;  and

(c)  The  accountant's statement or other exhibit required by Rule 12b-25(c) has
been  attached  if  applicable.

                                    PART III
                                    NARRATIVE

     State  below  in  reasonable  detail  why the Forms 10-K, 20-F, 11-K, 10-Q,
N-SAR,  N-CSR,  or  the transition report or portion thereof, could not be filed
within  the  prescribed  time  period.

     On  March  8,  2005,  The  GSI  Group,  Inc. (the "Company") filed with the
Securities  and  Exchange Commission a Current Report on Form 8-K (the "Report")
announcing  that  the  previously issued financial statements of the Company for
the  years  ended  December  31,  2003,  2002 and 2001 should not be relied upon
because  of  errors  believed  by  management  of  the Company to exist in those
financial  statements  and  management's  belief  that  a  restatement  of those
financial  statements  was likely. These possible errors relate to, as discussed
in further detail in the Report, the Company's accounting policies and practices
relating  to,  among  other  things,  workers'  compensation accrual, inventory,
compensation  expense  related  to  employee  stock  purchases  and  executive
compensation.

Because  of  the  additional  time  required  to  quantify  the  adjustments and
determine  the periods affected by such errors with respect to the periods to be
presented in the Company's Form 10-K for the period ended December 31, 2004 (the
"Form  10-K"), the Company cannot file its Form 10-K on or before March 31, 2005
without  unreasonable  effort  or  expense.

                                     PART IV
                                OTHER INFORMATION

     (1)  Name  and  telephone  number  of  person  to contact in regard to this
notification

     Russell  C.  Mello     (217)  226-4421
     ------------------     ---------------
     (Name)                    (Area  Code)  (Telephone  Number)

(2)  Have  all  other periodic reports required under Section 13 or 15(d) of the
Securities  Exchange  Act of 1934 or Section 30 of the Investment Company Act of
1940  during  the  preceding  12  months  or  for  such  shorter period that the
registrant  was required to file such report(s) been filed? If the answer is no,
identify  report(s).

[X]  Yes  [_]  No

     (3)  Is it anticipated that any significant change in results of operations
from  the corresponding period for the last fiscal year will be reflected by the
earnings  statements  to  be  included in the subject report or portion thereof?
                         [X]  Yes  [_]  No

     If  so:  attach  an explanation of the anticipated change, both narratively
and  quantitatively,  and,  if  appropriate,  state the reasons why a reasonable
estimate  of  the  results  cannot  be  made.

     The  Company expects that it will report a significantly lower net loss for
the  year  ended  December  31,  2004 as compared to the year ended December 31,
2003.  As  discussed  in  further detail in the Report, the Company is currently
engaged  in  a  review  of certain of its accounting policies and practices, and
until  the Company completes this review, it will be unable to make a reasonable
estimate  of  its  operating  results  for  the  year  ended  December 31, 2004.


     The  GSI  Group,  Inc.
     ----------------------
                  (Name of Registrant as Specified in Charter)

     Has  caused this notification to be signed on its behalf by the undersigned
thereunto  duly  authorized.


Date  March  31,  2005      By  /s/  Russell  C.  Mello
      ----------------          -----------------------
     Russell  C.  Mello
     Chief  Executive  Officer

          Instruction:  The  form  may  be signed by an executive officer of the
registrant  or  by any other duly authorized representative.  The name and title
of  the person signing the form shall be typed or printed beneath the signature.
If  the  statement  is  signed  on  behalf  of  the  registrant by an authorized
representative  (other  than  an  executive  officer),  evidence  of  the
representative's  authority  to  sign on behalf of the registrant shall be filed
with  the  form.

                                    ATTENTION

     Intentional  misstatements or omissions of fact constitute federal criminal
violations  (see  18  U.S.C.  1001).