0001050925-07-000003 10-K 7 20061231 20070327 20070327 GSI GROUP INC 0001050925 3523 370856587 DE 1231 10-K 34 333-43089 07720187 1004 EAST ILLINOIS ST ASSUMPTION IL 62510 2172264421 1004 EAST ILLINOIS ST ASSUMPTION IL 62510 10-K 1 form10k_2006.htm FORM 10-K FOR PERIOD ENDING 12/31/2006 EX-12.1 2 ex_12-1.htm EX. 12.1 EX-18.1 3 ex_18-1.htm EX. 18.1 EX-21 4 ex_21-1.htm EX. 21.1 EX-31.1 5 ex_31-1.htm EX. 31.1 EX-31.2 6 ex_31-2.htm EX. 31.2 EX-32.1 7 ex_32-1.htm EX. 32.1