| 1 | GDC | Grand China Air Co., Ltd. | IATA: CN, Callsign: Grand China, IATA Prefix: 895, | PRC | AVCODES |
| 2 | GDCE | GOLD CROSS EMS INC | | | SCAC4 |
| 3 | GDCG | GRAND CARTAGE CORPORATION | | | SCAC4 |
| 4 | GDCH | GOLDEN CHARIOT PRODUCTIONS | | | SCAC4 |
| 5 | GDCI | GDC TRUCKING INC | | | SCAC4 |
| 6 | GDCM | G D CARRIERS INC | | | SCAC4 |
| 7 | GDCN | GDC TRANSPORT LLC | | | SCAC4 |
| 8 | GDCO | G M S TRANSPORTATION INC | | | SCAC4 |
| 9 | GDCS | GOLD COAST TRANSPORTATION SERVICE, | | | SCAC1 |
| 10 | GDCS | GOLDEN COAST | | | SCAC4 |
| 11 | GDCT | GRAD, C TRUCKING | | | SCAC4 |
| 12 | GDCX | General American Marks Co. | added 1/1998; 7/2000-7/2005 | | NAKINA |
| 13 | GDCX | General American Transportation Corp. | added 7/1960; 4/1961-1/1994; eliminated 1/1998 | | NAKINA |
| 14 | GDCX | General American Transportation Corp. | added 7/60; 4/61-1/94; eliminated 1/98 | | NRHS |
| 15 | GDCX | General American Marks Co. | added 1/98; 7/2000 | | NRHS |
| 16 | GDCX | GENERAL AMERICAN MARKS COMPANY {GENERAL AMERICAN TRANSPORTATION CORP.] | | | PWRC |
| 17 | GDCX | General American Marks (GATX Corporation) | | | RSRV |
| 18 | GDCY | GARLOCK DU CANADA LTEE | | | SCAC4 |
