| 1 | GPC | Gulf Pearl Air Lines | Callsign: Air Gulfpearl, | LAR | AVCODES |
| 2 | GPC | Gulf Pearl Air Lines | | | ICAO1 |
| 3 | GPC | GEORGIA-PACIFIC CORPORATION | | | PWRC |
| 4 | GPCA | GROTON PACIFIC CARRIERS INC | | | SCAC4 |
| 5 | GPCC | GROUPE CANAM INC | | | SCAC4 |
| 6 | GPCD | GREEN, PAT CARDERS LTD | | | SCAC4 |
| 7 | GPCE | GLAZIER PACKING CO INC | | | SCAC4 |
| 8 | GPCF | GPC AFRAMAX CORPORATION | | | SCAC4 |
| 9 | GPCH | GOWELLS PATRIOT CASH FUELS | | | SCAC4 |
| 10 | GPCI | GRANITE PRECASTING & CONCRETE, INC | | | SCAC4 |
| 11 | GPCM | GEORGIA-PACIFIC CONSUMER PRODUCTS L | | | SCAC4 |
| 12 | GPCO | GLOBAL RECYCLING TRANSPORTATION LLC | | | SCAC4 |
| 13 | GPCP | GPCO INC | | | SCAC4 |
| 14 | GPCS | GLASMAN, J TRANSPORT | | | SCAC4 |
| 15 | GPCT | GEODYNE TRANSPORT | | | SCAC4 |
| 16 | GPCU | EBS GPG ARIA FZE | | UAE | BIC |
| 17 | GPCX | Georgia-Pacific Corp. | 7/2000-7/2005; eliminated 4/2007 | | NAKINA |
| 18 | GPCX | Georgia-Pacific Corp., Container Division | added 7/1990; 1/1994 | | NAKINA |
| 19 | GPCX | General Electric Co., General Purpose Control Dept. | added 1/1982; eliminated 4/1987 | | NAKINA |
| 20 | GPCX | General Electric Co. | added 7/1965; 7/1965-1/1975; eliminated 10/1975; 1/1980 | | NAKINA |
| 21 | GPCX | Mobil Oil Co., a Division of Soncony Mobil Oil Co., Inc. | added 1/1960; 4/1961; eliminated 10/1961 | | NAKINA |
| 22 | GPCX | General Petroleum Corp. | 4/1947-10/1957; eliminated 1/1960 | | NAKINA |
| 23 | GPCX | General Petroleum Corp. of California | 7/1935-1/1946 | | NAKINA |
| 24 | GPCX | General Petroleum Corp. (General Petroleum Corp. of California) | 7/1930-7/1935 | | NAKINA |
| 25 | GPCX | General Petroleum Corp. | 8/1920-7/1923 | | NAKINA |
| 26 | GPCX | General Petroleum Corp. of California | Apr-38 | | NRHS |
| 27 | GPCX | General Petroleum Corp. | 1/52-10/57; eliminated 1/60 | | NRHS |
| 28 | GPCX | Mobil Oil Co., a Division of Soncony Mobil Oil Co., Inc. | added 1/60 | | NRHS |
| 29 | GPCX | Socony Mobil Oil Co., Inc. | Apr-61 | | NRHS |
| 30 | GPCX | General Electric Co. | added 7/65; 7/65-1/80 | | NRHS |
| 31 | GPCX | General Electric Co., General Purpose Control Dept. | added 1/82; eliminated 4/87 | | NRHS |
| 32 | GPCX | Georgia-Pacific Corp., Container Division | added 7/90; 1/94 | | NRHS |
| 33 | GPCX | Georgia-Pacific Corp. | Jul-00 | | NRHS |
| 34 | GPCX | *MOBIL OIL CO. {GENERAL PETROLEUM CORP.] | | | PWRC |
| 35 | GPCX | *GENERAL ELECTRIC CO., GENERAL PURPOSE CONTROL DEPT. | | | PWRC |
| 36 | GPCX | *GEORGIA PACIFIC CORPORATION, CONTAINER DIVISION | | | PWRC |
| 37 | GPCX | Georgia-Pacific Corporation | | | RSRV |
| 38 | GPCY | GRAND FALLS PALLETS LTD | | | SCAC4 |