| 1 | GW | Golden West Airlines, Inc. | | USA | AVCODES |
| 2 | GW | Air Lines of Kuban | ICAO: KIL, Callsign: Air Kuban, IATA Prefix: 113, Founded in 1992. Ceased operations in 11 December 2012. | RUS | AVCODES |
| 3 | GW | Cimber Air GmbH | | D | AVCODES |
| 4 | GW | Gambia Airways | ICAO: GAW, Callsign: The Gambia, Designator GW recalled by IATA | WAG | AVCODES |
| 5 | GW | SkyGreece Airlines S.A. | ICAO: SGR, Callsign: Sky Greece, Commenced operations on 22 June 2014. Ceased operations on 03 September 2015. Founded in Athens, Greece in October 2012. | GR | AVCODES |
| 6 | GW | Go Fly, LLC t/a GoFly Tours | IATA Prefix: 094, Designator GW recalled by IATA | USA | AVCODES |
| 7 | GW | GetJet Airlines | ICAO: GJT, Callsign: Getjet, IATA Prefix: 059, Name changed from ORO Taksi, UAB. | LT | AVCODES |
| 8 | GW | Costa Rica GREEN AIRWAYS S.r.l. | | CR | AVCODES |
| 9 | GW | GREAT WESTERN RAILWAY CO. | | | PWRC |
| 10 | GW | Great Western Railway | Real: GWR, The Great Western Railway (GWR) was a British railway company and a marvel of civil engineering, linking South West England, the West Country and South Wales with London. It was founded in 1833, kept its identity through the 1923 grouping, and became part of British Railways at nationalisation in 1948. Known admiringly to some as "God's Wonderful Railway", jocularly to others as the "Great Way Round" (some of its earliest routes were not the most direct), and by some as the "Goes When Ready" due to the casual way in which some of its branch lines were run, it gained great fame as the "Holiday Railway", taking huge numbers of people to resorts in the southwest. | GB | TRAFFIC |
| 11 | GWA | Great Western Air, Inc. | Callsign: G-W Air, | USA | AVCODES |
| 12 | GWA | Golden West Airlines | Callsign: Golden West, | USA | AVCODES |
| 13 | GWA | Great Western Air | | | ICAO1 |
| 14 | GWA | Genesee & Wyoming Australia | | AUS | TRAFFIC |
| 15 | GWAA | GREWAL, A H TRANSPORT | | | SCAC4 |
| 16 | GWAQ | GREAT WALL TRANSPORTATION LTD | | | SCAC4 |
| 17 | GWAR | GREAT WESTERN AUCTIONEERS INC | | | SCAC4 |
| 18 | GWAT | GAWIUK CONSTRUCTION LTD | | | SCAC4 |
| 19 | GWAX | Railroad Salvage & Restoration, Inc. | 7/2000-7/2005 (not listed) | | NAKINA |
| 20 | GWAX | Railroad Salvage & Restoration, Inc. | Jul-00 | | NRHS |
| 21 | GWAX | RAILROAD SALVAGE & RESTORATION, INC. | | | PWRC |
| 22 | GWAX | Railroad Salvage and Restoration | | | RSRV |
| 23 | GWAX | RAILROAD SALVAGE & RESTORATION INC | | | SCAC4 |
| 24 | GWAY | GOODWAY CARGO LINE | | | SCAC4 |
| 25 | GWBR | GEORGE W BROWN INC | | | PWRC |
| 26 | GWBX | Carling Brewing Co. | addded 1/1955; eliminated 4/1955 | | NAKINA |
| 27 | GWBX | Griesdieck Western Brewery Co. | 7/1954; eliminated 1/1955 | | NAKINA |
| 28 | GWBX | Carling Brewing Co. | eliminated 4/55 | | NRHS |
| 29 | GWBX | CARLING BREWING CO. [GRIESDIECK WESTERN BREWERY CO.] | | | PWRC |
| 30 | GWC | Gulf Wings | Callsign: Gulf Wings, | UAE | AVCODES |
| 31 | GWCA | GATEWAY CARRIERS LTD | | | SCAC4 |
| 32 | GWCC | GURRISI, W C & SONS INC | | | SCAC4 |
| 33 | GWCD | G W NAVIGATION INC | | | SCAC4 |
| 34 | GWCF | GLENWAY COLONY FARMS LTD | | | SCAC4 |
| 35 | GWCI | GENERAL WAREHOUSE COMPANY | | | SCAC4 |
| 36 | GWCL | GREEN WORLD CARGO LLC | | | SCAC4 |
| 37 | GWCN | GREAT WEST CARRIERS INC | | | SCAC4 |
| 38 | GWCR | GREAT WHITE CORP | | | SCAC4 |
| 39 | GWCS | GOODWIN, T & M ENTERPRISES LTD | | | SCAC4 |
| 40 | GWCV | GOLDEN WINDOW COVERINGS SA DE CV | | | SCAC4 |
| 41 | GWCW | GREEN WORLD CARGO LLC | | | SCAC4 |
| 42 | GWCX | Greenway Center, LLC | 7/2005 (not listed) | | NAKINA |
| 43 | GWCX | Great Western Chemical Co. | added 4/1962; 7/1965-4/1970; eliminated 7/1971 | | NAKINA |
| 44 | GWCX | Garrett & Co., Inc. | 7/1930 | | NAKINA |
| 45 | GWCX | Garrett Wine Co. | 8/1920-7/1923 | | NAKINA |
| 46 | GWCX | Great Western Chemical Co. | added 4/62; 7/65-4/70 | | NRHS |
| 47 | GWCX | *GARRETT & CO., INC. [GARRETT WINE CO.] | | | PWRC |
| 48 | GWCX | *GREAT WESTERN CHEMICAL CO. | | | PWRC |
| 49 | GWCX | +GREENWAY CENTER, LLC | | | PWRC |
| 50 | GWCX | Greenway Centre | | | RSRV |
| 51 | GWCX | GREENWAY CENTER LLC | | | SCAC4 |
| 52 | GWDB | GATEWAY DISTRIBUTION INC | | | SCAC4 |
| 53 | GWDC | GROWER DIRECT MARKETING LLC | | | SCAC4 |
| 54 | GWDG | GREAT WEST DRILLING LTD | | | SCAC4 |
| 55 | GWDI | GLOBAL DISTRIBUTION INC | | | SCAC4 |
| 56 | GWDO | GREATWIDE DEDICATED TRANSPORT II LL | | | SCAC4 |
| 57 | GWDP | GREENWOOD PACKING PLANT | | | SCAC4 |
| 58 | GWDU | GRILLO-WERKE AG | | D | BIC |
| 59 | GWDU | GRILLO-WERKE AG | | | SCAC4 |
| 60 | GWEC | GARWIN EXPRESS LLC | | | SCAC4 |
| 61 | GWED | GOLD WING EXPRESS LLC | | | SCAC4 |
| 62 | GWEH | GATEWAY EXHIBIT SERVICES | | | SCAC4 |
| 63 | GWEL | GLEN WEST EXPRESS LTD | | | SCAC4 |
| 64 | GWER | Gateway Eastern Railway (Kansas City Southern Railway) | | | RSRV |
| 65 | GWER | GREAT WESTERN ENTERPRISES | | | SCAC4 |
| 66 | GWET | GROWER EXPRESS TRUCKING INC | | | SCAC4 |
| 67 | GWEX | Western Division, The Dow Chemical Co. | 1/1952-7/1965; eliminated 1/1966 | | NAKINA |
| 68 | GWEX | Great Western Division, The Dow Chemical Co. | 1/1941-1/1950 | | NAKINA |
| 69 | GWEX | Great Western Electro-Chemical Co. | 7/1930-4/1938 | | NAKINA |
| 70 | GWEX | Great Western Electro-Chemical Co. | Apr-38 | | NRHS |
| 71 | GWEX | Western Division, The Dow Chemical Co. | 1/52-7/65; eliminated 1/66 | | NRHS |
| 72 | GWEX | WESTERN DIV., DOW CHEMICAL CO.{GREAT WESTERN ELECTRO-CHEMICAL CO.] | | | PWRC |
| 73 | GWF | Galveston Wharf Co. | 8/1920-7/1954 | | NAKINA |
| 74 | GWF | Galveston Wharves | 10/1957-10/1966 & 1/1975-1/1980; eliminated 4/1986; eliminated 7/1988 | | NAKINA |
| 75 | GWF | Galveston Wharf Co. | 4/38-1/52 | | NRHS |
| 76 | GWF | Galveston Wharves | 10/57-10/66 & 1/75-1/80; eliminated 4/86; eliminated 7/88 | | NRHS |
| 77 | GWF | GALVESTON WHARVES | | | PWRC |
| 78 | GWF | Galveston Wharves | | | RSRV |
| 79 | GWF | Galveston Wharves | | USA | TRAFFIC |
| 80 | GWFA | GILLAN, W FARMS LTD | | | SCAC4 |
| 81 | GWFF | GATEWAY FREIGHT FORWARDERS COMPANY | | | SCAC4 |
| 82 | GWFL | GREAT WHITE FLEET LTD | | | SCAC4 |
| 83 | GWFO | GASSAFY WHOLESALE FLORIST | | | SCAC4 |
| 84 | GWFS | GATEWAY FREIGHT SYSTEMS INC | | | SCAC4 |
| 85 | GWFT | GREAT WHITE FLEET LINER SERVICES LT | | | SCAC4 |
| 86 | GWG | Green Africa Airways Limited | IATA: Q9, Callsign: Green Africa, | WAN | AVCODES |
| 87 | GWGH | GROWERS GREENHOUSE SUPPLIES INC | | | SCAC4 |
| 88 | GWGU | GRIMM & WULFF ANLAGEN UND SYSTEMBAU GMBH | | D | BIC |
| 89 | GWH | Gulf Wing Aviation Ltd | Callsign: Jupiter, | GH | AVCODES |
| 90 | GWHA | G & W HAULING & RIGGING INC | | | SCAC4 |
| 91 | GWHT | GUESS WHO TRUCKING INC | | | SCAC4 |
| 92 | GWHX | Stephens Energy Ltd. | added 10/1981; eliminated 4/1990 | | NAKINA |
| 93 | GWHX | Stephens Energy Ltd. | added 10/81; eliminated 4/90 | | NRHS |
| 94 | GWHX | STEVENS ENERGY LTD. | | | PWRC |
| 95 | GWHX | Stevens Energy | | | RSRV |
| 96 | GWI | Germanwings GmbH | IATA: 4U, Callsign: German Wings, Ceased operations on 07 April 2020. Name changed from Eurowings Flug GmbH. ICAO designator changed from EWF. ICAO callsign changed from Shark | D | AVCODES |
| 97 | GWI | Germanwings | IATA: 4U | | ICAO1 |
| 98 | GWI | GENESEE & WYOMING INDUSTRIES | | | PWRC |
| 99 | GWI | Germanwings | | D | TRAFFIC |
| 100 | GWIC | GREAT WESTERN INTERNATIONAL TRUCKIN | | | SCAC4 |
