| 1 | GAC | General Air Cargo G.A.C. | Callsign: General Cargo, | YV | AVCODES |
| 2 | GAC | GlobeAir AG | Callsign: Dream Team, | A | AVCODES |
| 3 | GAC | Guangzhou Automobile Corporation | | PRC | TRAFFIC |
| 4 | GACF | GARAGE A CHAMBERLAND & FILS | | | SCAC4 |
| 5 | GACG | GERDAU AMERISTEEL CORPORATION | | | SCAC4 |
| 6 | GACH | GATLINGS CHARTER INC | | | SCAC4 |
| 7 | GACI | GT TRANSPORT | | | SCAC4 |
| 8 | GACK | GAC SHIPPING (USA) INC | | | SCAC4 |
| 9 | GACN | GARDNER TRUCKING | | | SCAC4 |
| 10 | GACO | GATECO OIL COMPANY | | | SCAC4 |
| 11 | GACR | G A C TRANSCO INC | | | SCAC4 |
| 12 | GACT | GANTT, CHARLES TRUCKING INC | | | SCAC4 |
| 13 | GACU | ABODI | | E | BIC |
| 14 | GACU | CONTENEDORES DE GALICIA SA | | | SCAC3 |
| 15 | GACU | COMERCIAL ABODI SA | | | SCAC4 |
| 16 | GACV | GREEN ASSOCIATES LOGISTICS INC | | | SCAC4 |
| 17 | GACW | GET AWAY CHARTERS | | | SCAC4 |
| 18 | GACX | General American Marks Co. | added 1/1998; 7/2000-7/2005 | | NAKINA |
| 19 | GACX | General American Transportation Corp. | 7/1937-1/1994; eliminated 1/1998 | | NAKINA |
| 20 | GACX | General American Transportation Corp. | 4/38-1/94; eliminated 1/98 | | NRHS |
| 21 | GACX | General American Marks Co. | added 1/98; 7/2000 | | NRHS |
| 22 | GACX | GENERAL AMERICAN MARKS CO. [{GENERAL AMERICAN TRANSPORTATION CORP.] | | | PWRC |
| 23 | GACX | General American Marks (GATX Corporation) | | | RSRV |
| 24 | GACX | General American Marks Company | | USA | TRAFFIC |
