| Meaning | Category |
| GPC Interface Adapter | Governmental->NASA |
| Gaian Intelligence Agency | Miscellaneous->Funnies |
| Garuda Indonesia Airlines | Regional->Airport Codes |
| GastroIntestinal Anastomosis | Medical->Physiology |
| Gordon Ingram Asscoiates | Business->Firms |
| Government In Action | Governmental->US Government |
| Ground Isolation Assault | Governmental->Military |
| Grupo Islámico Armado | International->Spanish |
| Guaranteed Interest Annuities | Business->Mortgage |
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