GGA may refer to: Gga (Devanagari) (ॻ), used in Sindhi Apostolic Generation Church (Indonesian: ), an Indonesian church Gao language Generalized gradient approximation Georges Giralt PhD Award, a European scientific award in robotics Girl Guides Australia Goemon's Great Adventure, a 1998 video game Golden Gate Academy, in San Francisco, California, United States Gongora, a genus of orchid Good girl art Gossip Girl: Acapulco, a Mexican television series Governor-General of Australia Hotel and Restaurant Workers' Union (Austria), a former Austrian trade union GGA, a codon for the amino acid glycine