| 1 | GAS | Galena Air Service | Callsign: Galena Air Serivce, | USA | AVCODES |
| 2 | GAS | Galena Air Service | | | ICAO1 |
| 3 | GASC | GEORGIA, ASHBURN, SYLVESTER & CAMILLA RAILROAD | | | PWRC |
| 4 | GASC | Georgia, Ashburn, Sylvester & Camilla Railroad | | | RSRV |
| 5 | GASC | GASCHO TRUCKING INC | | | SCAC4 |
| 6 | GASE | G A S ENTERPRISES LTD | | | SCAC4 |
| 7 | GASH | GATE SHIPHOLDING SA | | | SCAC4 |
| 8 | GASI | GARCEAUS AUTO SALES INC | | | SCAC4 |
| 9 | GASJ | GUERRA AUTO SALES | | | SCAC4 |
| 10 | GASP | GALAN SHIPPING LIMITED | | | SCAC4 |
| 11 | GAST | GASTELUM CAMPOY, OSCAR DANIEL | | | SCAC4 |
| 12 | GASU | BULKHAUL LTD | | GB | BIC |
| 13 | GASU | BULKHAUL (UK) LTD | | | SCAC4 |
| 14 | GASV | GOBEL AG SERVICE | | | SCAC4 |
| 15 | GASW | GAS TWENTY TWO (22) LLC | | | SCAC4 |
| 16 | GASX | General American Marks Co. | added 1/1998; 7/2000-7/2005 | | NAKINA |
| 17 | GASX | General American Transportation Corp. | 1/1943-4/1961; eliminated 10/1962; added 4/1970; 4/1970-1/1994; eliminated 1/1998 | | NAKINA |
| 18 | GASX | Gasoline Corp. | 8/1920 | | NAKINA |
| 19 | GASX | General American Transportation Corp. | 1/52-4/61; added 4/70; 4/70-1/94; eliminated 1/98 | | NRHS |
| 20 | GASX | General American Marks Co. | added 1/98; 7/2000 | | NRHS |
| 21 | GASX | *GASOLINE CORP. | | | PWRC |
| 22 | GASX | +GENERAL AMERICAN MARKS COMPANY [GENERAL AMERICAN STOCK EXPRESS] | | | PWRC |
| 23 | GASX | General American Marks (GATX Corporation) | | | RSRV |
| 24 | GASY | GA MASONRY | | | SCAC4 |
| 25 | GASZ | PARGAS, INC. | | | PWRC |
