| 5401 | GSKM | GIESEKE, MICHAEL | | | SCAC4 |
| 5402 | GSKN | G S K TRANSPORT LTD | | | SCAC4 |
| 5403 | GSKP | GOLDEN STAR TRUCKING INC | | | SCAC4 |
| 5404 | GSKU | GESTION DE SERVICIOS MARITIMOS AEREOS Y TERRESTRES, S.A | | E | BIC |
| 5405 | GSL | Geographic Air Surveys Ltd. | Callsign: Survey-Canada, | CDN | AVCODES |
| 5406 | GSL | Geographic Air Surveys | | | ICAO1 |
| 5407 | GSLC | G FOUR S (G4S) INTERNATIONAL LOGIST | | | SCAC4 |
| 5408 | GSLD | GESTION LALONDE 1976 INC | | | SCAC4 |
| 5409 | GSLG | GST LOGISTICS INC | | | SCAC4 |
| 5410 | GSLI | G S LINER | | | SCAC4 |
| 5411 | GSLK | GREENSCAPE DESIGN AND DECOR INC | | | SCAC4 |
| 5412 | GSLL | GESELL, DONALD INC | | | SCAC4 |
| 5413 | GSLM | GRAEBEL ST LOUIS MOVERS INC | | | SCAC4 |
| 5414 | GSLN | GESTION ST-LOUIS ENRG | | | SCAC4 |
| 5415 | GSLP | GIBSON L P TRANSPORT INC | | | SCAC4 |
| 5416 | GSLT | GOSAL TRANSPORT INC | | | SCAC4 |
| 5417 | GSLU | GOLD STAR LINE LTD | | HK | BIC |
| 5418 | GSLU | GOLD STAR LINE LTD | | | SCAC4 |
| 5419 | GSLV | GOLDEN STANDARD LOGISTICS LLC | | | SCAC4 |
| 5420 | GSLW | G & S LOGISTICS | | | SCAC4 |
| 5421 | GSLX | Silcott Railway Equipment | added 10/2003; eliminated 7/2004; 7/2005 (not listed) | | NAKINA |
| 5422 | GSLX | Godehaux Sugars, Inc. | 7/1935 | | NAKINA |
| 5423 | GSLX | SILCOTT RAILWAY EQUIPMENT | | | PWRC |
| 5424 | GSLX | George R Silcott Railway Equipment | | | RSRV |
| 5425 | GSLX | SILCOTT RAILWAY EQUIPMENT LTD | | | SCAC4 |
| 5426 | GSLY | GLOBAL STAR LINES LIMITED | | | SCAC4 |
| 5427 | GSM | Globespan Airways Limited t/a Flyglobespan | IATA: B4, Callsign: Globespan, IATA Prefix: 060, IATA designator change to Y2 | GB | AVCODES |
| 5428 | GSM | Globespan Airways Limited t/a Flyglobespan | IATA: Y2, Callsign: Globespan, IATA Prefix: 060, Ceased operations on 16 December 2009. Designator Y2 reinsated by IATA. IATA designator change from B4 | GB | AVCODES |
| 5429 | GSM | Gestair Aviation Malta Limited | Callsign: Gestair Malta, | M | AVCODES |
| 5430 | GSM | Flyglobespan | IATA: B4 | | ICAO1 |
| 5431 | GSM | Great Smokey Mountains Ry. | 1/1994-7/2005 | | NAKINA |
| 5432 | GSM | Great Smokey Mountains Ry. | 1/94-7/2000 | | NRHS |
| 5433 | GSM | GREAT SMOKEY MOUNTAINS RAILWAY, INC. | | | PWRC |
| 5434 | GSM | Great Smoky Mountains Railroad | | | RSRV |
| 5435 | GSM | GSM | | NL | TRAFFIC |
| 5436 | GSMB | GIALIS MACHINERY INC | | | SCAC4 |
| 5437 | GSMG | GO SYSTEMS MRO LOGISTICS | | | SCAC4 |
| 5438 | GSMI | GSM TRANSPORTATION LLC | | | SCAC4 |
| 5439 | GSMK | GROSSMAN TRUCKING | | | SCAC4 |
| 5440 | GSML | GERON ASSOCIATES LIMITED | | | SCAC4 |
| 5441 | GSMM | GOLD STAR MARITIME COMPANY | | | SCAC4 |
| 5442 | GSMN | GROSSMAN, RIK | | | SCAC4 |
| 5443 | GSMO | GASMART TRANSPORT LLC | | | SCAC4 |
| 5444 | GSMP | GLORIOUS STEAMSHIP INC | | | SCAC4 |
| 5445 | GSMQ | GS | | | SCAC4 |
| 5446 | GSMR | GULF & MISSISSIPPI RAILROAD CORP. | | | PWRC |
| 5447 | GSMS | GRAND STRAND MOVING & STORAGE LLC | | | SCAC4 |
| 5448 | GSMT | GRAND SLAM TRANSPORTATION | | | SCAC4 |
| 5449 | GSMU | AIR LIQUIDE HEALTHCARE ESPAÑA, S.L. | | E | BIC |
| 5450 | GSMU | GASMEDI 2000 S A U | | | SCAC4 |
| 5451 | GSMV | GRAEBEL SACRAMENTO MOVERS | | | SCAC4 |
| 5452 | GSMW | GULF STATES MARINE SUPPLIES INCORPO | | | SCAC4 |
| 5453 | GSMX | GREAT SANDHILLS TERMINAL MARKETING | | | SCAC4 |
| 5454 | GSNF | GASS, RONALD F | | | SCAC4 |
| 5455 | GSNH | GEBHART & SONS TRUCKING | | | SCAC4 |
| 5456 | GSNK | G S N TRUCKING CORP | | | SCAC4 |
| 5457 | GSNO | GST CORPORATION | | | SCAC4 |
| 5458 | GSNP | G & S TRANSPORT | | | SCAC4 |
| 5459 | GSNT | GOLDEN SUN CARRIERS AND DISTRIBUTOR | | | SCAC4 |
| 5460 | GSNV | GOLDEN SEA NAVIGATION CO | | | SCAC4 |
| 5461 | GSNX | HELM Financial Corp. | added 7/1998; 7/2000-7/2005 | | NAKINA |
| 5462 | GSNX | Gulf States Utilities Co. | added 10/1981; 1/1994; eliminated 7/1998 | | NAKINA |
| 5463 | GSNX | Gulf States Utilities Co. | added 10/81; 1/94; eliminated 7/98 | | NRHS |
| 5464 | GSNX | HELM Financial Corp. | added 7/98; 7/2000 | | NRHS |
| 5465 | GSNX | *GULF STATES UTILITIES CO. | | | PWRC |
| 5466 | GSNX | +HELM FINANCIAL CORPORATION | | | PWRC |
| 5467 | GSNX | Gulf States Utilities (Helm Financial Corporation) | | | RSRV |
| 5468 | GSNX | HELM FINANCIAL CORPORATION | | | SCAC4 |
| 5469 | GSNY | GEM STONE TRUCKING COMPANY | | | SCAC4 |
| 5470 | GSO | Global Flight Solutions Ltd | Callsign: Sky Walker, | GB | AVCODES |
| 5471 | GSOA | GREAT SOUTHERN COACHES OF | | | SCAC4 |
| 5472 | GSOC | GRIST OIL COMPANY | | | SCAC4 |
| 5473 | GSOF | GRAEBEL/SOUTH FLORIDA MOVERS INC | | | SCAC4 |
| 5474 | GSOK | GREENBUSH LOGISTICS INCORPORATED | | | SCAC4 |
| 5475 | GSOM | GREAT SOUTHERN MOTOR CARGO INC | | | SCAC4 |
| 5476 | GSON | GOLDEN STATE OVERNIGHT | | | SCAC4 |
| 5477 | GSOP | G & S OIL PRODUCTS INC | | | SCAC4 |
| 5478 | GSOR | Wabash & Ohio R.R. | added 1/1995 | | NAKINA |
| 5479 | GSOR | Indiana Hi-Rail Corp. | added 7/1995; eliminated 7/1998; 7/2000-7/2005 | | NAKINA |
| 5480 | GSOR | Indiana Hi-Rail Corp. | added 4/1986; 1/1994; eliminated 1/1995 | | NAKINA |
| 5481 | GSOR | Indiana Hi-Rail Corp. | added 4/86; 1/94; eliminated 1/95 | | NRHS |
| 5482 | GSOR | Wabash & Ohio R.R. | added 1/95 | | NRHS |
| 5483 | GSOR | Indiana Hi-Rail Corp. | added 7/95; eliminated 7/98; 7/2000 | | NRHS |
| 5484 | GSOR | INDIANA HI-RAIL CORP.[(WOHO) WABASH & OHIO RAILROAD] | | | PWRC |
| 5485 | GSOR | Indiana Hi-Rail Corporation | | | RSRV |
| 5486 | GSOT | GREAT SOUTHERN TRUCKING CO | | | SCAC4 |
| 5487 | GSOU | GLOBE OPUS SHIPPING LINE (UK) LTD | | GB | BIC |
| 5488 | GSOX | Gold Standard Oils Ltd. | 1/1946-1/1950 | | NAKINA |
| 5489 | GSOX | Valvoline Oil Co. | 7/1937-1/1941 | | NAKINA |
| 5490 | GSOX | Galena Signal Oil Co. (Valvoline Oil Co.) | 7/1932-7/1935 | | NAKINA |
| 5491 | GSOX | Valvoline Oil Co. | Apr-38 | | NRHS |
| 5492 | GSOX | GOLD STANDARD OILS LTD. [VALVOLINE OIL CO.; GALENA SIGNAL OIL CO.] | | | PWRC |
| 5493 | GSP | Airlift Alaska | Callsign: Green Speed, | USA | AVCODES |
| 5494 | GSP | Global Flight School | Callsign: Global School, | P | AVCODES |
| 5495 | GSP | Airlift Alaska | | | ICAO1 |
| 5496 | GSP | GULF STATES POWER | | | PWRC |
| 5497 | GSPC | GREATER SHIPPING CO LTD | | | SCAC4 |
| 5498 | GSPE | GLOBAL SUPPLY TRANSPORTATION SOLUTI | | | SCAC4 |
| 5499 | GSPI | GROUPE SCULNICK TRANSPORTATION | | | SCAC4 |
| 5500 | GSPK | GOLD SPUR TRUCKING LLC | | | SCAC4 |
