GIGA
| Acronym | Definition |
|---|---|
| GIGA | German Institute of Global and Area Studies (formerly German Overseas Institute; Hamburg, Germany) |
| GIGA | GLOBE (Global Legislators Organization for a Balanced Environment) International General Assembly |
| GIGA | Garbage In Garbage Out |
| GIGA | Graphic Instruction Graphic Acceleration |
| GIGA | Gruppo Italiano Giovani Astrofili (Italian: Young Italian Amateur Astronomers Group) |
| GIGA | Gemeentelijk Integrale Gezondheidsactiviteiten (Dutch) |