| GTC CONSTRUCTION SERVICES CORPORATIONLocation not reported, CT · Merged | Location not reported, CT | Corporation | Jul 22, 1977 | Merged |
| GTE PRODUCTS OF CONNECTICUT CORPORATIONLocation not reported, CT · Merged | Location not reported, CT | Corporation | Jan 31, 1977 | Merged |
| GTE INFORMATION SYSTEMS INTERNATIONAL INCORPORATEDLocation not reported, CT · Revoked | Location not reported, CT | Corporation | Sep 20, 1973 | Revoked |
| GTE INTERNATIONAL SALES CORPORATIONLocation not reported, CT · Withdrawn | Location not reported, CT | Corporation | Aug 30, 1972 | Withdrawn |
| VERIZON CORPORATE SERVICES GROUP INC.Location not reported, CT · Active | Location not reported, CT | Corporation | May 17, 1973 | Active |
| GTE NEW VENTURES CORPORATIONLocation not reported, CT · Withdrawn | Location not reported, CT | Corporation | May 21, 1973 | Withdrawn |
| GTE REALTY CORPORATIONLocation not reported, CT · Revoked | Location not reported, CT | Corporation | Jun 17, 1974 | Revoked |
| GALAXY HOLDING COMPANY, INC.Location not reported, CT · Merged | Location not reported, CT | Corporation | Jun 30, 1975 | Merged |
| GALILEO ELECTRO-OPTICS CORPORATIONLocation not reported, CT · Revoked | Location not reported, CT | Corporation | May 27, 1977 | Revoked |
| GALLENKAMP LEASING CORP.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Oct 3, 1974 | Revoked |
| GALSTON CORPORATIONLocation not reported, CT · Forfeited | Location not reported, CT | Corporation | Mar 13, 1964 | Forfeited |
| GANSETT COMPANY, THELocation not reported, CT · Dissolved | Location not reported, CT | Corporation | Nov 22, 1957 | Dissolved |
| GANDEC, INC.Location not reported, CT · Forfeited | Location not reported, CT | Corporation | Dec 20, 1976 | Forfeited |
| GARDNER-DENVER COMPANYLocation not reported, CT · Withdrawn | Location not reported, CT | Corporation | Mar 28, 1962 | Withdrawn |
| GARGOYLE PRODUCTIONS, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Mar 17, 1976 | Revoked |
| GARRITY INDUSTRIES INC.Madison, CT · Merged | Madison, CT | Corporation | Jul 17, 1967 | Merged |
| GCS SERVICE, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Nov 29, 1935 | Revoked |
| GATES, MCDONALD & COMPANYLocation not reported, CT · Revoked | Location not reported, CT | Corporation | Sep 27, 1974 | Revoked |
| GEM MANUFACTURING LLCWaterbury, CT · Active | Waterbury, CT | LLC | Jan 30, 2023 | Active |
| GEMSCO, INC.Milford, CT · Revoked | Milford, CT | Corporation | Jun 25, 1969 | Revoked |
| GENERAL AUTOMATION, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Jan 12, 1970 | Revoked |
| GENERAL BOILER CASING CO., INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Oct 24, 1972 | Revoked |
| GENERAL CABLE EXPORT CORP.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Dec 5, 1973 | Revoked |
| GENERAL CABLE INTERNATIONAL OPERATIONS LIMITEDLocation not reported, CT · Dissolved | Location not reported, CT | Corporation | Nov 23, 1976 | Dissolved |
| GENERAL CHEMICAL CORPORATIONLocation not reported, CT · Active | Location not reported, CT | Corporation | Sep 15, 1966 | Active |
| GENERAL DIAPER SERVICE CORP.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Dec 8, 1961 | Withdrawn |
| GENERAL EQUITIES, INC.Southington, CT · Dissolved | Southington, CT | Corporation | Apr 9, 1974 | Dissolved |
| GENERAL MOTOR INNS, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Apr 18, 1966 | Revoked |
| GENERAL PERSONNEL INVESTIGATIONS INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Jul 21, 1967 | Withdrawn |
| GENERAL PLASMA, INC.Location not reported, CT · Merged | Location not reported, CT | Corporation | Feb 14, 1966 | Merged |
| GTE CORPORATIONLocation not reported, CT · Revoked | Location not reported, CT | Corporation | May 17, 1973 | Revoked |
| TALLEY INTERNATIONAL INVESTMENT CORPORATIONLocation not reported, CT · Withdrawn | Location not reported, CT | Corporation | Jun 25, 1969 | Withdrawn |
| WORDSTREAM CORPORATIONLocation not reported, CT · Withdrawn | Location not reported, CT | Corporation | Nov 29, 1962 | Withdrawn |
| GENUINE PARTS COMPANYLocation not reported, CT · Active | Location not reported, CT | Corporation | Nov 2, 1962 | Active |
| AMERICAN INTERNATIONAL CONTRACTORS, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Jun 5, 1975 | Revoked |
| GEORGE FIDLER, INC.Location not reported, CT · Forfeited | Location not reported, CT | Corporation | Jan 21, 1972 | Forfeited |
| PIC LIQUIDATING CORP.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Jun 18, 1974 | Revoked |
| MEADOWS MANOR, INC.Location not reported, CT · Merged | Location not reported, CT | Corporation | Apr 1, 1969 | Merged |
| WATERBURY MANOR, INC.Location not reported, CT · Merged | Location not reported, CT | Corporation | Apr 24, 1969 | Merged |
| GILBANE, INC.Location not reported, CT · Active | Location not reported, CT | Corporation | Apr 2, 1948 | Active |
| GINO'S OF CONN., INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Aug 8, 1969 | Revoked |
| GINO'S OF PENNSYLVANIA, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Nov 2, 1970 | Revoked |
| GINSBURG BROTHERS, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Oct 30, 1972 | Withdrawn |
| GLADIA CORPORATIONLocation not reported, CT · Withdrawn | Location not reported, CT | Corporation | Oct 24, 1967 | Withdrawn |
| GLASGOW, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | May 24, 1973 | Revoked |
| GLEN ENTERPRISES, INC.Location not reported, CT · Dissolved | Location not reported, CT | Corporation | Apr 15, 1975 | Dissolved |
| GLOBE LININGS, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Jul 15, 1975 | Revoked |
| GLORIA HOLDING COMPANY, INC.Location not reported, CT · Merged | Location not reported, CT | Corporation | Jun 30, 1975 | Merged |
| GOLD BOND STAMP COMPANY OF THE NORTHEAST, INC.Location not reported, CT · Withdrawn | Location not reported, CT | Corporation | Nov 24, 1969 | Withdrawn |
| GOOD DESIGN, INC.Location not reported, CT · Revoked | Location not reported, CT | Corporation | Aug 30, 1976 | Revoked |