| 5201 | GRYS | GRAYS, ROBERT SONS INC | | | SCAC4 |
| 5202 | GRYT | GRAY TRANSPORT | | | SCAC4 |
| 5203 | GRYV | GARRETT RECYCLING INC | | | SCAC4 |
| 5204 | GRYX | TransMatrix, Inc. | added 4/2002; eliminated 1/2004; 7/2005 (not listed) | | NAKINA |
| 5205 | GRYX | John H. Grace Co. | 7/1935; 1/1941-7/2000; eliminated 4/2002 | | NAKINA |
| 5206 | GRYX | John H. Grace | 7/1930-7/1932; 7/1937-4/1938 | | NAKINA |
| 5207 | GRYX | John H. Grace Co. | 4/38-7/2000 | | NRHS |
| 5208 | GRYX | TRANSMATRIX, INC. (JOHN H. GRACE CO.) | | | PWRC |
| 5209 | GRYX | John H. Grace (Transmatrix) | | | RSRV |
| 5210 | GRYX | TRANSMATRIX INC | | | SCAC4 |
| 5211 | GRYY | G R Y N | | | SCAC4 |
| 5212 | GRZ | Government of Zambia Communications Flight (Aircraft) | Callsign: Com Flight, | Z | AVCODES |
| 5213 | GRZ | Zambia Communications Flight | | | ICAO1 |
| 5214 | GRZD | GRIZZARD TRANSFER CO | | | SCAC4 |
| 5215 | GRZF | GARZA VILLANUEVA, JOSE ISRAEL | | | SCAC4 |
| 5216 | GRZH | GARZA HERNANDEZ, CARLOS RODOLFO | | | SCAC4 |
| 5217 | GRZI | GRIZZLY EXPRESS | | | SCAC4 |
| 5218 | GRZL | GRIZZLY TRANSPORT LTD | | | SCAC4 |
| 5219 | GRZM | GARZA MIRELES, MARCO ANTONIO | | | SCAC4 |
| 5220 | GRZU | GRUZOVOZOFF LTD | | | SCAC4 |
| 5221 | GS | Air Foyle Limited | ICAO: UPA, Callsign: Foyle, Designator recalled by IATA | GB | AVCODES |
| 5222 | GS | Grant Aviation, Inc. | ICAO: SWV, Designator GS* recalled by IATA | USA | AVCODES |
| 5223 | GS | Air Vosges | | F | AVCODES |
| 5224 | GS | General and Aviation Services Ltd. | ICAO: NGS, Callsign: Golf Sierra, Name changed to General Air Services Limited. ICAO callsign changed to Genair | WAN | AVCODES |
| 5225 | GS | Grand China Express Co. Ltd. | ICAO: GCR, IATA Prefix: 826, Name changed to Tianjin Airlines Co. Ltd | PRC | AVCODES |
| 5226 | GS | Tianjin Airlines Co. Ltd | ICAO: GCR, Callsign: China Dragon, IATA Prefix: 826, Name changed from Grand China Express Co. Ltd. ICAO Callsign changed to Bo Hai | PRC | AVCODES |
| 5227 | GS | Tianjin Airlines Co. Ltd | ICAO: GCR, Callsign: Bo Hai, IATA Prefix: 826, Name changed from Grand China Express Co. Ltd. ICAO Callsign changed from China Dragon. | PRC | AVCODES |
| 5228 | GS | GEORGIA SOUTHERN RAILWAY CO. | | | SCAC4 |
| 5229 | GS&G | Georgia, Southwestern & Gulf R.R. | 7/1923-4/1938 | | NAKINA |
| 5230 | GS&G | Georgia, Southwestern & Gulf R.R. | Apr-38 | | NRHS |
| 5231 | GS&G | GEORGIA, SOUTHWESTERN & GULF RAILROAD | | | PWRC |
| 5232 | GSA | Garden State Airlines, Inc. | Callsign: Garden State, | USA | AVCODES |
| 5233 | GSA | Garden State Airlines | | | ICAO1 |
| 5234 | GSAB | Göteborgs Spårvägar | City: Göteborg | S | TRAFFIC |
| 5235 | GSAC | G S FREIGHT INC | | | SCAC4 |
| 5236 | GSAG | GLOBAL STEAMSHIP AGENCIES INC | | | SCAC4 |
| 5237 | GSAJ | GOLD STAR TRUCKING LLC | | | SCAC4 |
| 5238 | GSAL | GRACESA LTD GIBRALTER | | | SCAC4 |
| 5239 | GSAM | GLOBAL STAR ARIMAR BV | | | SCAC4 |
| 5240 | GSAND | Travel: Golden Sands | | BG | TRAFFIC |
| 5241 | GSAQ | G & S TRUCKING | | | SCAC4 |
| 5242 | GSAR | GSA 2005 TRANSPORT | | | SCAC4 |
| 5243 | GSAW | GTI TRANSPORT LTD | | | SCAC4 |
| 5244 | GSAX | Granite State Concrete Co. | 7/2000-7/2005 (not listed) | | NAKINA |
| 5245 | GSAX | Granite State Concrete Co. | Jul-00 | | NRHS |
| 5246 | GSAX | GRANITE STATE CONCRETE CO. | | | PWRC |
| 5247 | GSAX | Granite State Concrete | | | RSRV |
| 5248 | GSAX | GRANITE STATE CONCRETE CO INC | | | SCAC4 |
| 5249 | GSB | Gading Sari Aviation Services Sdn Bhd d/b/a G Sari | IATA: 3G, Callsign: Gading Sari, IATA Prefix: 380, Name changed to DRB-HICOM AsiaCargo Express Sdn. Bhd. ICAO Designator changed to CXM | MAL | AVCODES |
| 5250 | GSBC | G S B TRUCKING | | | SCAC4 |
| 5251 | GSBE | GSA INTERNATIONAL LTD | | | SCAC4 |
| 5252 | GSBG | GENO'S BROKERAGE INC | | | SCAC4 |
| 5253 | GSBI | GENERAL SHALE BRICK INC | | | SCAC4 |
| 5254 | GSBQ | GATES & SONS BAR-B-QUE PRODUCTS INC | | | SCAC4 |
| 5255 | GSC | Golden State Airlines, Inc. | Callsign: Golden State, ICAO designator changed to GOL | USA | AVCODES |
| 5256 | GSC | Grandstar Cargo International Airlines Co., Ltd | IATA: GD, Callsign: Grandstar Cargo, Founded in 2008. Ceased operations in May 2012. | PRC | AVCODES |
| 5257 | GSCB | GAGNE & SON CONCRETE BLOCKS INC | | | SCAC4 |
| 5258 | GSCD | GRAND SHIPPING CO LTD | | | SCAC4 |
| 5259 | GSCE | G S C ENTERPRISES INC | | | SCAC4 |
| 5260 | GSCH | GARDEN STATE CONTAINER HAULAGE INC | | | SCAC4 |
| 5261 | GSCH | Geiger und Schüle Bau GmbH | | DE | VKM |
| 5262 | GSCM | GASCHEM SERVICES GMBH & CO KG | | | SCAC4 |
| 5263 | GSCO | GULF SHIPPING COMPANY | | | PWRC |
| 5264 | GSCO | GSC LOGISTICS INC | | | SCAC4 |
| 5265 | GSCP | GARDENSCAPE TRANSPORT INC | | | SCAC4 |
| 5266 | GSCQ | GRIMES SUPPLY CHAIN SERVICES INC | | | SCAC4 |
| 5267 | GSCR | GULF STAR CONTRACTING | | | SCAC4 |
| 5268 | GSCS | GRAEBEL/SOUTH CAROLINA MOVERS INC | | | SCAC4 |
| 5269 | GSCT | GROUP TRANSPORT INC | | | SCAC4 |
| 5270 | GSCU | GSM TANK CONTAINER CANARIAS, S.L. | | E | BIC |
| 5271 | GSCU | EUROTAINER U.S., INC. | | | PWRC |
| 5272 | GSCU | Eurotainer US | | | RSRV |
| 5273 | GSCU | GESCO | | | SCAC4 |
| 5274 | GSCV | GREENSTAR STETAMSHIP COMPANY GMBH & | | | SCAC4 |
| 5275 | GSCW | Garden State Coachways | | US-NJ | TRAFFIC |
| 5276 | GSCX | General American Marks Co. | added 1/2003; 7/2005 | | NAKINA |
| 5277 | GSCX | GATX Financial Corp. | added 1/2002; eliminated 1/2003 | | NAKINA |
| 5278 | GSCX | GATX/GLC Leasing Corp. | added 4/1985; 1/1994-7/2000; eliminated 1/2002 | | NAKINA |
| 5279 | GSCX | Greenville Leasing Co. | added 4/1981; eliminated 4/1985 | | NAKINA |
| 5280 | GSCX | Greenlease Co., a Division of Greenville Steel Car Co. | 1/1980; eliminated 4/1981 | | NAKINA |
| 5281 | GSCX | Greenville Steel Car Co. | 4/1970-1/1975 | | NAKINA |
| 5282 | GSCX | Greenlease Co., a Division of Greenville Steel Car Co. | 10/1966 | | NAKINA |
| 5283 | GSCX | Greenville Steel Car | 7/1965 | | NAKINA |
| 5284 | GSCX | Greenlease Co., a Division of Greenville Steel Car Co. | added 7/1963 | | NAKINA |
| 5285 | GSCX | Gulf States Creosoting Co. | 7/1930-7/1954; eliminated 1/1955 | | NAKINA |
| 5286 | GSCX | Gulf States Creosoting Co. | 4/38-1/52 | | NRHS |
| 5287 | GSCX | Greenlease Co., a Division of Greenville Steel Car Co. | added 7/63 | | NRHS |
| 5288 | GSCX | Greenville Steel Car | Jul-65 | | NRHS |
| 5289 | GSCX | Greenlease Co., a Division of Greenville Steel Car Co. | Oct-66 | | NRHS |
| 5290 | GSCX | Greenville Steel Car Co. | 4/70-1/75 | | NRHS |
| 5291 | GSCX | Greenlease Co., a Division of Greenville Steel Car Co. | 1/80; eliminated 4/81 | | NRHS |
| 5292 | GSCX | Greenville Leasing Co. | added 4/81; eliminated 4/85 | | NRHS |
| 5293 | GSCX | GATX/GLC Leasing Corp. | added 4/85; 1/94-7/2000 | | NRHS |
| 5294 | GSCX | *GULF STATES CREOSOTING CO. | | | PWRC |
| 5295 | GSCX | +GENERAL AMERICAN MARKS COMPANY / GREENVILLE LEASING CORPORATION | | | PWRC |
| 5296 | GSCX | Greenville Leasing (GATX) | | | RSRV |
| 5297 | GSCX | GENERAL AMERICAN MARKS COMPANY | | | SCAC4 |
| 5298 | GSCX | GATX Capital Corporation | | USA | TRAFFIC |
| 5299 | GSCZ | GURNSEY STONE CO. | | | PWRC |
| 5300 | GSD | GOODMAN-STANNAFORTH DIVISION | | | PWRC |
