GEMA
- Di Gi Charat
- GEMA (German organization)
- Gas and Electricity Markets Authority
- Gema (given name)
- Gema, Zamora
- Gemma (disambiguation)
- Gemmological Association of Great Britain
- Georgia Emergency Management Agency
- Gikuyu, Embu, and Meru Association
- Global Engine Alliance
- Kriegsmarine
- Ladja (Dragon Quest)
- Álvarez Guedes