| 1 | GA | Garuda Indonesia | ICAO: GIA, Callsign: Indonesia, IATA Prefix: 126, Name changed from Garuda Indonesia Airways P.T. ICAO callsign changed from Garuda | RI | AVCODES |
| 2 | GA | Garuda Indonesia Airways P.T. | ICAO: GIA, Callsign: Garuda, IATA Prefix: 126, Name changed to Garuda Indonesia. ICAO callsign changed to Indonesia | RI | AVCODES |
| 3 | GA | CSX Transportation, Inc. | 7/2000-7/2005 | | NAKINA |
| 4 | GA | Norfolk Southern Transportation, Inc. | 1/1994 | | NAKINA |
| 5 | GA | CSX Transportation | added 7/1987 | | NAKINA |
| 6 | GA | Seaboard System R.R., Inc. | added 1/1983; eliminated 7/1987 | | NAKINA |
| 7 | GA | Georgia R.R. Co. | 4/1938-10/1966 & 1/1975-1/1980; eliminated 1/1983 | | NAKINA |
| 8 | GA | Georgia R.R. Co. | 4/38-10/66 & 1/75-1/80; eliminated 1/83 | | NRHS |
| 9 | GA | Seaboard System R.R., Inc. | added 1/83; eliminated 7/87 | | NRHS |
| 10 | GA | CSX Transportation | added 7/87 | | NRHS |
| 11 | GA | Norfolk Southern Transportation, Inc. | Jan-94 | | NRHS |
| 12 | GA | CSX Transportation | Jul-00 | | NRHS |
| 13 | GA | CSX TRANSPORTATION, INC. [NORFOLK SOUTHERN; SEABOARD GEORGIA RR] | | | PWRC |
| 14 | GA | Georgia Railroad (CSX Transportation) | | | RSRV |
| 15 | GA | Georgia Railroad Co. | | USA | TRAFFIC |
| 16 | GAA | Business Express Airlines, Inc. | IATA: HQ, Callsign: Bizex, Ceased operations on 03 December 2000. Name changed from Atlantic Air | USA | AVCODES |
| 17 | GAA | Atlantic Air | Callsign: Atlantic Air, Name changed to Business Express | USA | AVCODES |
| 18 | GAA | Global Africa Cargo | IATA: Z5, Callsign: Global Africa, IATA Prefix: 204, | ZW | AVCODES |
| 19 | GAA | Business Express | | | ICAO1 |
| 20 | GAA | Business Express Airlines | | USA | TRAFFIC |
| 21 | GAAB | Georgia & Alabama Division, South Carolina Central R.R. Co., Inc. | added 10/1989; 1/1994; eliminated 7/1997; 7/2000 | | NAKINA |
| 22 | GAAB | Georgia & Alabama Division, South Carolina Central R.R. Co., Inc. | added 10/89; 1/94; eliminated 7/97; 7/2000 | | NRHS |
| 23 | GAAB | (SCRF) SOUTH CAROLINA CENTRAL RR-GEORGIA & ALABAMA DIV. | | | PWRC |
| 24 | GAAB | South Carolina Central Railroad Georgia and Alabama Division | | | RSRV |
| 25 | GAAG | GARAGA INC | | | SCAC4 |
| 26 | GAAJ | GOMEZ AGUIRRE, ALEJANDRO | | | SCAC4 |
| 27 | GAAL | GEER, ALLAN TRUCKING LLC | | | SCAC4 |
| 28 | GAAL | Gaal S.p.A. | | IT | VKM |
| 29 | GAAM | GARNICA TRANSPORTATION INC | | | SCAC4 |
| 30 | GAAN | GARBER AGFREIGHT INC | | | SCAC4 |
| 31 | GAAP | GRACE TRANSPORTATION LLC | | | SCAC4 |
| 32 | GAAQ | G & A TRANSPORT | | | SCAC4 |
| 33 | GAAU | GUJARAT ALKALIES AND CHEMICALS LIMITED | | IND | BIC |
| 34 | GAB | Gendall Air Ltd. | Callsign: Gendall, | CDN | AVCODES |
| 35 | GAB | Aerobell Airlines | Callsign: Cali, | CR | AVCODES |
| 36 | GAB | Gendall Air | | | ICAO1 |
| 37 | GABC | GAB TRANSPORT INC | | | SCAC4 |
| 38 | GABD | GANEM VARGAS, JUAN RAMON | | | SCAC4 |
| 39 | GABE | GABERT, JACK | | | SCAC4 |
| 40 | GABK | GASPER-ATKINSON BULK DIVISION INC | | | SCAC4 |
| 41 | GABL | GABELINE TRUCKING | | | SCAC4 |
| 42 | GABN | GAMBRINUS TRUCKING CO INC | | | SCAC4 |
| 43 | GABON | Trans-Gabon Railway | | G | TRAFFIC |
| 44 | GABS | GABELINE, W T & SONS LLC | | | SCAC4 |
| 45 | GABU | GABO GAS 2 SAS DI GALVA GNI EVALTIE | | | SCAC4 |
| 46 | GABW | Go-ahead Baden-Württemberg GmbH | | D | TRAFFIC |
| 47 | GABX | General American Marks Co. | 7/2000-7/2005 | | NAKINA |
| 48 | GABX | General American Transportation Corp. | 1/1946-4/1961; eliminated 10/1962 | | NAKINA |
| 49 | GABX | General American Transportation Corp. —temporary expiring 30June1941 | 1/1941 | | NAKINA |
| 50 | GABX | General American Transportation Corp. | 1/52-4/61 | | NRHS |
| 51 | GABX | General American Marks Co. | Jul-00 | | NRHS |
| 52 | GABX | GENERAL AMERICAN MARKS COMPANY | | | PWRC |
| 53 | GABX | General American Marks (GATX Corporation) | | | RSRV |
| 54 | GABX | GENERAL AMERICAN MARKS COMPANY | | | SCAC4 |
| 55 | GABY | GABY VENTURES LTD | | | SCAC4 |
| 56 | GAC | General Air Cargo G.A.C. | Callsign: General Cargo, | YV | AVCODES |
| 57 | GAC | GlobeAir AG | Callsign: Dream Team, | A | AVCODES |
| 58 | GAC | Guangzhou Automobile Corporation | | PRC | TRAFFIC |
| 59 | GACF | GARAGE A CHAMBERLAND & FILS | | | SCAC4 |
| 60 | GACG | GERDAU AMERISTEEL CORPORATION | | | SCAC4 |
| 61 | GACH | GATLINGS CHARTER INC | | | SCAC4 |
| 62 | GACI | GT TRANSPORT | | | SCAC4 |
| 63 | GACK | GAC SHIPPING (USA) INC | | | SCAC4 |
| 64 | GACN | GARDNER TRUCKING | | | SCAC4 |
| 65 | GACO | GATECO OIL COMPANY | | | SCAC4 |
| 66 | GACR | G A C TRANSCO INC | | | SCAC4 |
| 67 | GACT | GANTT, CHARLES TRUCKING INC | | | SCAC4 |
| 68 | GACU | ABODI | | E | BIC |
| 69 | GACU | CONTENEDORES DE GALICIA SA | | | SCAC3 |
| 70 | GACU | COMERCIAL ABODI SA | | | SCAC4 |
| 71 | GACV | GREEN ASSOCIATES LOGISTICS INC | | | SCAC4 |
| 72 | GACW | GET AWAY CHARTERS | | | SCAC4 |
| 73 | GACX | General American Marks Co. | added 1/1998; 7/2000-7/2005 | | NAKINA |
| 74 | GACX | General American Transportation Corp. | 7/1937-1/1994; eliminated 1/1998 | | NAKINA |
| 75 | GACX | General American Transportation Corp. | 4/38-1/94; eliminated 1/98 | | NRHS |
| 76 | GACX | General American Marks Co. | added 1/98; 7/2000 | | NRHS |
| 77 | GACX | GENERAL AMERICAN MARKS CO. [{GENERAL AMERICAN TRANSPORTATION CORP.] | | | PWRC |
| 78 | GACX | General American Marks (GATX Corporation) | | | RSRV |
| 79 | GACX | General American Marks Company | | USA | TRAFFIC |
| 80 | GAD | South Coast Airways Ltd. | Callsign: Southcoast, Name changed to South Coast Aviation (Bournemouth) Ltd. | GB | AVCODES |
| 81 | GAD | South Coast Aviation (Bournemouth) Ltd. | Callsign: Southcoast, Name changed from South Coast Airways Ltd. | GB | AVCODES |
| 82 | GAD | South Coast Aviation | | | ICAO1 |
| 83 | GADC | GALA LIVESTOCK LOGISTICS INC | | | SCAC4 |
| 84 | GADI | GARCIA COTA, JORGE LUIS | | | SCAC4 |
| 85 | GADJ | GADOLA, J & J TRUCKING | | | SCAC4 |
| 86 | GADL | G & D INTEGRATED INC | | | SCAC4 |
| 87 | GADN | GADSDEN TRUCKING LLC | | | SCAC4 |
| 88 | GADO | GT A DIVISION OF | | | SCAC4 |
| 89 | GADQ | GALE DELIVERY, INC | | | SCAC1 |
| 90 | GADU | MARINE ANTIPOLLUTION ENTERPRISE JSCO | | BG | BIC |
| 91 | GADX | SAB Trucking Inc. | 7/2005 (not listed) | | NAKINA |
| 92 | GADX | *GENERAL AMERICAN MARKS COMPANY [PILLSBURY] | | | PWRC |
| 93 | GADX | +SAB TRUCKING INC. | | | PWRC |
| 94 | GADX | SAB TRUCKING INC | | | SCAC4 |
| 95 | GAE | Grand Aire Express, Inc. | Callsign: Grand Express, | USA | AVCODES |
| 96 | GAE | Shenzhen Gulf Aviation Co., Ltd. | Callsign: Gulf Aviation, | PRC | AVCODES |
| 97 | GAE | Grand Aire Express | | | ICAO1 |
| 98 | GAEE | GAONA ARTEAGA, MARTIN | | | SCAC4 |
| 99 | GAEI | GARLAND TRANSPORT | | | SCAC4 |
| 100 | GAEK | GAD TRANSPORT | | | SCAC4 |
