| Abbreviation | Definition |
|---|---|
| GHQ | General HeadQuarters |
| GHQX | eneral Headquarters Exercise |
| GHQX | General Headquarters Exercise |
| GHZ | Gigahertz (1 billion hertz) |
| GI | Game Informer |
| GI | General Inductee |
| GI | General Infantry |
| GI | General Instructions |
| GI | Geomatics and Imagery |
| GI | God's Infantry |
| GI | Government Issue |
| GI | Gram |
| GI&S | Geospatial Information and Services |
| GIA | Ground Isolation Assault |
| GIAC | Graphic Input Aggregate Control |
| GIAC | Graphic Interface Aggregate Controller |
| GIC | (Gabarit International De Chargement) International Loading Gauge |
| GICOD | Good Idea Cut Off Date |
| GIDEP | Government/Industry Data Exchange Program |
| GIE | Global Information Environment |