| 4001 | GNWR | GENESEE & WYOMING RAILROAD CO. | | | PWRC |
| 4002 | GNWR | Genesee and Wyoming Railroad | | | RSRV |
| 4003 | GNWT | GOOD NEWS TRANSPORTATION INC | | | SCAC4 |
| 4004 | GNWY | GREENWAY TRANSPORTATION INC | | | SCAC4 |
| 4005 | GNX | Genex Ltd | Callsign: Aerogenex, Registered in 1997. | BY | AVCODES |
| 4006 | GNX | Genex | | | ICAO1 |
| 4007 | GNXA | GENX TRANSPORTATION | | | SCAC4 |
| 4008 | GNXB | GENTLE TRANSPORT INC | | | SCAC4 |
| 4009 | GNXC | GUNTNER TRANSPORT LLC | | | SCAC4 |
| 4010 | GNXE | GENERAL TRANSPORT | | | SCAC4 |
| 4011 | GNXI | GENOX TRANSPORTATION INC | | | SCAC4 |
| 4012 | GNXJ | GENEX LOGISTICS LLC | | | SCAC4 |
| 4013 | GNXK | GENESIS TRANSPORTATION | | | SCAC4 |
| 4014 | GNXL | GTN TRANSNET LTD | | | SCAC4 |
| 4015 | GNXO | GENERATION TRANSPORT | | | SCAC4 |
| 4016 | GNXP | GENNARO EXPRESS LINES LTD | | | SCAC4 |
| 4017 | GNXR | GARNER EXPRESS LLC | | | SCAC4 |
| 4018 | GNXS | GENERAL TRANSPORTATION SERVICES COR | | | SCAC4 |
| 4019 | GNY | German Navy | Callsign: German Navy, | D | AVCODES |
| 4020 | GNY | German Navy | | | ICAO1 |
| 4021 | GNYL | GNY LOGISTICS INC | | | SCAC4 |
| 4022 | GNZ | General Aviation Sp. z.o.o. | Callsign: Gonzo, Name changed to General Aviation Services Ltd. | PL | AVCODES |
| 4023 | GNZ | General Aviation Services Ltd. | Callsign: Gonzo, Name changed from General Aviation Sp. z.o.o. | PL | AVCODES |
| 4024 | GNZ | General Aviation | | | ICAO1 |
| 4025 | GNZE | GONZALEZ, ANTONIO | | | SCAC4 |
| 4026 | GNZF | GLINZ FARM | | | SCAC4 |
| 4027 | GNZG | GONZALEZ GARZA, LUIS MANUEL | | | SCAC4 |
| 4028 | GNZH | GONZALES, HECTOR M | | | SCAC4 |
| 4029 | GNZK | GENTZKOW TRUCKING SERVICE, INC | | | SCAC1 |
| 4030 | GNZP | GONZALES, PAUL TRUCKING | | | SCAC4 |
| 4031 | GNZR | GONZALEZ EXPRESS | | | SCAC4 |
| 4032 | GNZS | GONZALES SANDOVAL, JESUS | | | SCAC4 |
| 4033 | GO | Go Fly Ltd. | ICAO: GOE, Callsign: Go-Flight, IATA Prefix: 333, Merged into Easyjet U2*/EZY. IATA designator changed from OG w.e.f. 29 November 2000. | GB | AVCODES |
| 4034 | GO | Air Stord A.S. | ICAO: SOR, Callsign: Air Stord, founded in January 1990. Ceased operations on 19 January 1999. | N | AVCODES |
| 4035 | GO | Kuzu Airlines Cargo Transport | ICAO: KZU, IATA Prefix: 444, Name changed to ULS Airlines Cargo on 03 July 2009. Name changed from Baron Hava Yolu Kargo Tasimaciligi AS | TR | AVCODES |
| 4036 | GO | ULS Havayollair Kargo Tasimacilik A.S. | ICAO: KZU, IATA Prefix: 444, Name changed from Kuzu Airlines Cargo Transport on 03 July 2009. Name changed from Baron Hava Yolu Kargo Tasimaciligi AS | TR | AVCODES |
| 4037 | GO | G&O: Guinovart & Oshsa | | E | TRAFFIC |
| 4038 | GO | CGOSTEC GmbH | | DE | VKM |
| 4039 | GOA | Alberta Government | Callsign: Alberta, | CDN | AVCODES |
| 4040 | GOA | Alberta Government | | | ICAO1 |
| 4041 | GOAA | GRAND OPENING TRUCK LINES INC | | | SCAC4 |
| 4042 | GOAC | GLOBAL AIRCRAFT INDUSTRIES LTD | | | SCAC4 |
| 4043 | GOAF | GOLDEN ARROW LOGISTICS INC | | | SCAC4 |
| 4044 | GOAG | GLOBAL OCEAN AGENCY LINES LLC | | | SCAC4 |
| 4045 | GOAK | GOLDEN OAK | | | SCAC4 |
| 4046 | GOAL | GOLDEN ALLIANCE LOGISTICS INC | | | SCAC4 |
| 4047 | GOAL | Go Ahead London | | GB | TRAFFIC |
| 4048 | GOAM | GUARDSHIP OF AMERICA | | | SCAC4 |
| 4049 | GOAU | PHOENIX INTERNATIONAL SRL | | I | BIC |
| 4050 | GOAU | PHOENIX INTERNATIONAL SRL | | | SCAC4 |
| 4051 | GOAY | GODERICH AIRCRAFT INC | | | SCAC4 |
| 4052 | GOB | Dash Aviation Ltd. | Callsign: Pilgrim, | GB | AVCODES |
| 4053 | GOB | Dash Aviation | | | ICAO1 |
| 4054 | GOB | Gotthardbahn | | CH | TRAFFIC |
| 4055 | GOBA | GLOBAL TRANSPORTATION & LOGISTICS I | | | SCAC4 |
| 4056 | GOBC | GOLDEN FREEDOM TRANSPORT INC | | | SCAC4 |
| 4057 | GOBK | GOODMAN, GARY TRUCKING INC | | | SCAC4 |
| 4058 | GOBL | GOBLECO INC | | | SCAC4 |
| 4059 | GOBN | GO-BAR TRUCKING LLP | | | SCAC4 |
| 4060 | GOBO | GOSAL BROTHERS TRANSPORT INC | | | SCAC4 |
| 4061 | GOBP | GOLDEN STATE TRANSPORT LTD | | | SCAC4 |
| 4062 | GOBR | GONZALEZ PEREZ, MAX ALONZO | | | SCAC4 |
| 4063 | GOBT | GORDON, BILL TRUCKING | | | SCAC4 |
| 4064 | GOBUE | AS GoBus | | EST | TRAFFIC |
| 4065 | GOBUS | Go Bus Transport Ltd | | NZ | TRAFFIC |
| 4066 | GOC | Geocuba | Callsign: Geocuba, | C | AVCODES |
| 4067 | GOCD | GRAY OIL COMPANY INC | | | SCAC4 |
| 4068 | GOCE | GLOVER OIL COMPANY INC | | | SCAC4 |
| 4069 | GOCF | GONVICK OIL CO | | | SCAC4 |
| 4070 | GOCG | GENERAL GAS CARRIER CORPORATION VII | | | SCAC4 |
| 4071 | GOCJ | GOFF OIL CORP | | | SCAC4 |
| 4072 | GOCM | GOC LTD | | | SCAC4 |
| 4073 | GOCP | GALLAHAN OIL CO | | | SCAC4 |
| 4074 | GOCR | GREAT OCEAN SHIPPING LIMITED | | | SCAC4 |
| 4075 | GOCT | GANT OIL CO INC | | | SCAC4 |
| 4076 | GOCU | GREENFIELD OVERSEAS CONTAINER, INC. | | | PWRC |
| 4077 | GOCU | Greenfield Overseas Container | | | RSRV |
| 4078 | GOCX | Chevron Phillips Chemical Co. L.P. | added 1/2001; 7/2005 | | NAKINA |
| 4079 | GOCX | Chevron Chemical Co. | added 4/1996; 7/2000; eliminated 1/2001 | | NAKINA |
| 4080 | GOCX | Chevron U.S.A. Inc. | 1/1994; eliminated 4/1996 | | NAKINA |
| 4081 | GOCX | Gulf Refining and Marketing Co., Division of Gulf Oil Corp. | added 7/1982 | | NAKINA |
| 4082 | GOCX | Gulf Oil Co.—U.S. Division of Gulf Oil Corp. | added 10/1976; 1/1980; eliminated 7/1982 | | NAKINA |
| 4083 | GOCX | Gulf Oil Co.--U.S. Division of Gulf Oil Corp. | 1/80; eliminated 7/82 | | NRHS |
| 4084 | GOCX | Gulf Refining and Marketing Co., Division of Gulf Oil Corp. | added 7/82 | | NRHS |
| 4085 | GOCX | Chevron U.S.A. Inc. | 1/94; eliminated 4/96 | | NRHS |
| 4086 | GOCX | Chevron Chemical Co. | added 4/96; 7/2000; eliminated 1/2001 | | NRHS |
| 4087 | GOCX | Chevron Phillips Chemical Co. L.P. | added 1/2001 | | NRHS |
| 4088 | GOCX | CHEVRON PHILLIPS CHEMICAL CO. (CHEVRON U.S.A. INC.) [GULF OIL PRODUCTS CO.] | | | PWRC |
| 4089 | GOCX | Gulf Oil Products (Chevron Phillips Chemical) | | | RSRV |
| 4090 | GOCX | CHEVRON PHILLIPS CHEMICAL COMPANY L | | | SCAC4 |
| 4091 | GOCY | GALE OIL CO INC | | | SCAC4 |
| 4092 | GODB | GODBOUT, NOEL TRANSPORT LTD | | | SCAC4 |
| 4093 | GODD | GO TRANSFER SA DE CV | | | SCAC4 |
| 4094 | GODE | GRANGE SUPPLY CO OF ODESSA | | | SCAC4 |
| 4095 | GODJ | G.O.D., INC | | | SCAC1 |
| 4096 | GODJ | G O D INC | | | SCAC4 |
| 4097 | GODK | GOOD TRUCKING INC | | | SCAC4 |
| 4098 | GODN | GODS ARMY CENTENO TRANSPORT | | | SCAC4 |
| 4099 | GODP | GORDON TRUCKING INC (REFRIGERATED D | | | SCAC4 |
| 4100 | GODQ | GODBOUT, ANDRE JOAILLIER ENRG | | | SCAC4 |
