| Acronym | Definition |
|---|
| GAIA | Global Action in the Interest of Animals (Brussels, Belgium) |
| GAIA | Global Astrometric Interferometer for Astrophysics (European Space Agency) |
| GAIA | Grantley Adams International Airport (Barbados) |
| GAIA | Global Alliance for Incinerator Alternatives |
| GAIA | Gestion Académique Informatisée des Actions de Formation (French: Academic Management of Computerized Training Actions; Ministry of National Education) |
| GAIA | Global AIDS Interfaith Alliance |
| GAIA | Global Anti-Incinerator Alliance |
| GAIA | Game Angling Instructors' Association (UK) |
| GAIA | Graphical Astronomy and Image Analysis Tool |
| GAIA | Generic Architecture for Information Availability |
| GAIA | Graphic Arts Industries Association (Canada) |
| GAIA | GUI Application Interoperability Architecture |
| GAIA | Global Alliance for Interfaith Action (global nonprofit initiative) |