GAA
- Acid alpha-glucosidase
- Business Express Airlines
- Ford GAA engine
- GADA 601
- Ga language
- Gaa language
- Gaelic Athletic Association
- Gaelic football
- Gay Activists Alliance
- Gemmological Association of Australia
- General Allotment Act
- Generic Authentication Architecture
- Global Accounting Alliance
- Global Aquaculture Alliance
- Goals against average
- Government budget
- Grenada Athletic Association
- Group Areas Act
- Guam Adventist Academy