Ga
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Ga or ga or GA may stand for:
- A billion (1 000 000 000) years (Ga), see Giga
- The Ga, an ethnic group of Ghana
- Ga language, the spoken by the Ga
- Gabon, ISO 3166-1 alpha-2 country code
- gallium (Ga), symbol for the chemical element
- Garuda Indonesia, IATA code of the airlines
- general assembly
- General Aviation, all aviation except commercial carriers and military
- Genetic algorithm
- Georgia, abbreviation for the U.S. state (GA, Ga.)
- Irish language, the ISO 639 alpha-2 code, from Irish Gaeilge
- Tabun, a nerve agent
- Girls Aloud, a British girl group, winners of Popstars: The Rivals.