| 1 | GD | Transportes Aereos Ejecutivos, S.A. de C.V. | ICAO: TEJ, Callsign: Transejecutivos, Ceased operations on 24 February 2000. Designator GD recalled by IATA | MEX | AVCODES |
| 2 | GD | Air Alpha Greenland A/S | ICAO: AHA, Callsign: Air Alpha, Designator GD recalled by IATA | GRO | AVCODES |
| 3 | GD | Midland Air Cargo Ltd. | Callsign: Midcar, | GB | AVCODES |
| 4 | GD | Channel Aviation Ltd. | ICAO: GJD, Callsign: Sarnair, Designator GD recalled by IATA | GB | AVCODES |
| 5 | GD | Grandstar Cargo International Airlines Co., Ltd | ICAO: GSC, Callsign: Grandstar Cargo, Founded in 2008. Ceased operations in May 2012. | PRC | AVCODES |
| 6 | GD | Aviair Pty Ltd | | AUS | AVCODES |
| 7 | GDA | Gold Air International Limited | Callsign: Goldair, Purchased by Air Partner. | GB | AVCODES |
| 8 | GDA | GoldAir | | | ICAO1 |
| 9 | GDA | Gdansk | Real: ZKM | PL | TRAFFIC |
| 10 | GDAA | GDA TRUCKING INC | | | SCAC4 |
| 11 | GDAB | GODDARD, STEVEN R | | | SCAC4 |
| 12 | GDAC | GILENO DISTRIBUTION SERVICES/ G & E | | | SCAC4 |
| 13 | GDAF | GRATEFULLY DEADICATED TRUCKIN' INC | | | SCAC4 |
| 14 | GDAG | G & D TRUCKING LLC | | | SCAC4 |
| 15 | GDAH | GREATWIDE DEDICATED TRANSPORT II LL | | | SCAC4 |
| 16 | GDAI | GARDINER, DALE LIVESTOCK TRUCKING I | | | SCAC4 |
| 17 | GDAK | GOTAAS, DARRELL | | | SCAC4 |
| 18 | GDAN | G D TRANPORT INC | | | SCAC4 |
| 19 | GDAS | GDA TRUCKING SERVICES | | | SCAC4 |
| 20 | GDAW | GDS DELIVERY AND LOGISTICS | | | SCAC4 |
| 21 | GDB | Gendarmerie Belge | Callsign: Belgian Gendarmerie, | B | AVCODES |
| 22 | GDB | Gendarmerie Belge | | | ICAO1 |
| 23 | GDBA | GDB 2007 INC | | | SCAC4 |
| 24 | GDBI | GRAND BASKET CO INC | | | SCAC4 |
| 25 | GDBK | GREAT LAKES COLD LOGISTICS INC | | | SCAC4 |
| 26 | GDBL | GOULD, DONALD BLAINE | | | SCAC4 |
| 27 | GDBR | GERARD BROTHERS, INC | | | SCAC1 |
| 28 | GDC | Grand China Air Co., Ltd. | IATA: CN, Callsign: Grand China, IATA Prefix: 895, | PRC | AVCODES |
| 29 | GDCE | GOLD CROSS EMS INC | | | SCAC4 |
| 30 | GDCG | GRAND CARTAGE CORPORATION | | | SCAC4 |
| 31 | GDCH | GOLDEN CHARIOT PRODUCTIONS | | | SCAC4 |
| 32 | GDCI | GDC TRUCKING INC | | | SCAC4 |
| 33 | GDCM | G D CARRIERS INC | | | SCAC4 |
| 34 | GDCN | GDC TRANSPORT LLC | | | SCAC4 |
| 35 | GDCO | G M S TRANSPORTATION INC | | | SCAC4 |
| 36 | GDCS | GOLD COAST TRANSPORTATION SERVICE, | | | SCAC1 |
| 37 | GDCS | GOLDEN COAST | | | SCAC4 |
| 38 | GDCT | GRAD, C TRUCKING | | | SCAC4 |
| 39 | GDCX | General American Marks Co. | added 1/1998; 7/2000-7/2005 | | NAKINA |
| 40 | GDCX | General American Transportation Corp. | added 7/1960; 4/1961-1/1994; eliminated 1/1998 | | NAKINA |
| 41 | GDCX | General American Transportation Corp. | added 7/60; 4/61-1/94; eliminated 1/98 | | NRHS |
| 42 | GDCX | General American Marks Co. | added 1/98; 7/2000 | | NRHS |
| 43 | GDCX | GENERAL AMERICAN MARKS COMPANY {GENERAL AMERICAN TRANSPORTATION CORP.] | | | PWRC |
| 44 | GDCX | General American Marks (GATX Corporation) | | | RSRV |
| 45 | GDCY | GARLOCK DU CANADA LTEE | | | SCAC4 |
| 46 | GDD | Golden Airlines, Inc. | Callsign: Golden Airlines, | USA | AVCODES |
| 47 | GDD | Golden Airlines | | | ICAO1 |
| 48 | GDDI | GROUPE DEAN DAIGLE GROUP INC | | | SCAC4 |
| 49 | GDDN | GLOBAL DENTAL DIRECT INC | | | SCAC4 |
| 50 | GDE | Servicios Aereos Gadel, S.A. de C.V. | Callsign: Gadel, | MEX | AVCODES |
| 51 | GDE | Great Dane Airlines A/S | IATA: DW, Callsign: Great Dane, Declared Bankrupt on 11 October 2021. | DK | AVCODES |
| 52 | GDE | Servicios Aereos Gadel | | | ICAO1 |
| 53 | GDEA | GOODEARTH MARITIME LTD | | | SCAC4 |
| 54 | GDEC | GARCIACANO DEANDAR, ELEONORA GRISEL | | | SCAC4 |
| 55 | GDER | GRANDERIE FARM & COUNTRY LTD | | | SCAC4 |
| 56 | GDEY | GREENLIGHT DELIVERY | | | SCAC4 |
| 57 | GDF | DF Aviation | Ceased operations. | UA | AVCODES |
| 58 | GDFH | GROUND FLIGHT LLC | | | SCAC4 |
| 59 | GDFI | GREIDANUS FARMS INC | | | SCAC4 |
| 60 | GDFQ | GEDDES FURNITURE & ANTIQUES | | | SCAC4 |
| 61 | GDFR | GOLDEN DELL FARMS LTD | | | SCAC4 |
| 62 | GDFS | GLENDENNING BROTHERS INC | | | SCAC4 |
| 63 | GDG | S.P. Aviation, Inc. t/a GoodJET | Callsign: Golden Gate, | USA | AVCODES |
| 64 | GDG | S.P. Aviation | | | ICAO1 |
| 65 | GDG | | | S | TRAFFIC |
| 66 | GDGC | GOLDEN GLOW STEAMSHIP INC | | | SCAC4 |
| 67 | GDGI | GEODIGITAL INTERNATIONAL INC | | | SCAC4 |
| 68 | GDGV | GO-DAWG TRANSPORTATION SERVICES LLC | | | SCAC4 |
| 69 | GDH | Guneydogu Havacilik Isletmesi Ltd Std | Callsign: Rising Sun, | TR | AVCODES |
| 70 | GDH | Guneydogu Havacilik Isletmesi | | | ICAO1 |
| 71 | GDHA | GOODHEART TRUCKING INC | | | SCAC4 |
| 72 | GDHS | GIBERSON, D H & SONS LTD | | | SCAC4 |
| 73 | GDHT | GANDHI TRADING CO | | | SCAC4 |
| 74 | GDI | Grand International Airways, Inc. | IATA: 8L, | RP | AVCODES |
| 75 | GDIA | GRANDPA DAN INC | | | SCAC4 |
| 76 | GDIB | GLENWAY DISTRIBUTION | | | SCAC4 |
| 77 | GDIC | GO DEEP INTERNATIONAL INC | | | SCAC4 |
| 78 | GDIE | GOODINE, CARVELL & SONS LTD | | | SCAC4 |
| 79 | GDIG | GDI TRANS INC | | | SCAC4 |
| 80 | GDIM | GATE DIRECT INC | | | SCAC4 |
| 81 | GDIV | GOLD DIV | | | SCAC4 |
| 82 | GDIX | GDI RAIL, INC. | | | PWRC |
| 83 | GDIX | GDI RAIL INC | | | SCAC4 |
| 84 | GDJ | Gävle - Dala Järnvägar | 1859 - 1948 | S | svenska-lok.se |
| 85 | GDJ | Gävle - Dala Järnvägar | 1859 - 1948 | S | TRAFFIC |
| 86 | GDJ | Museiföreningen Gefle-Dala Jernväg | | SE | VKM |
| 87 | GDJL | GALINDO ALDAPE, JOSE LUIS | | | SCAC4 |
| 88 | GDJM | GORDON, JOHN MICHAEL | | | SCAC4 |
| 89 | GDJX | Grimmel Industries | 7/2000-7/2005 (not listed) | | NAKINA |
| 90 | GDJX | Grimmel Industries | Jul-00 | | NRHS |
| 91 | GDJX | GRIMMEL INDUSTRIES | | | PWRC |
| 92 | GDJX | Grimmel Industries | | | RSRV |
| 93 | GDK | Goldeck-Flug Ges.m.b.H. | Callsign: Goldeck Flug, | A | AVCODES |
| 94 | GDK | Goldeck-Flug | | | ICAO1 |
| 95 | GDKC | GANDY TRUCKING LLC | | | SCAC4 |
| 96 | GDKH | GOLDEN STATE TRUCKING, THE | | | SCAC4 |
| 97 | GDKI | GDK INTERNATIONAL INC | | | SCAC4 |
| 98 | GDKN | GRAND TRUCKING LLC | | | SCAC4 |
| 99 | GDKR | GOAD TRUCKING | | | SCAC4 |
| 100 | GDKS | GARANTI DENIZCILIK A S | | | SCAC4 |
