| Acronym | Definition |
|---|
| GIA | Gemological Institute of America |
| GIA | Groupe Islamique Armé (Armed Islamic Group; terrorist organization) |
| GIA | Girls in Action |
| GIA | Ghana International Airlines |
| GIA | Gross Internal Area (surveying measurement) |
| GIA | Groupes Islamiques Armés (Armed Muslim Groups, Algeria) |
| GIA | Government Information Awareness (Massachusetts Institute of Technology) |
| GIA | Garuda Indonesia Airways (now Garuda Indonesia) |
| GIA | Gaming Intelligence Agency |
| GIA | Global IP-Anycast |
| GIA | Guaranteed Interest Account |
| GIA | Gregorian Institute of America |
| GIA | Geothermal Implementing Agreement |
| GIA | Geophysical Institute, University of Alaska |
| GIA | General Indemnity Agreement |
| GIA | Gastrointestinal Anastomosis |
| GIA | Guaranteed Investment Account |
| GIA | Group Insurance Arrangement (IRS Form 5500) |
| GIA | Government Inspection Agency |
| GIA | Geo Informatics and Applications |
| GIA | Gamextreme Interaktif Ansiklopedi (Gamextreme Interactive Encyclopedia) |
| GIA | Greater Iraqi Army |
| GIA | Geography in Action (educational class) |
| GIA | Global Investment Analysis |
| GIA | Genomics in Aquaculture (International Symposium) |
| GIA | Gaussian Impulse Antenna |
| GIA | Georgetown International Academy (Guyana) |
| GIA | Group Internal Audit |
| GIA | Global Industry Analysts (various locations) |
| GIA | Gob Image Analyser (glass production) |