| GISA | Georgia Independent School Association | 乔治亚独立学校协会 |
| GISA | Graduate International Students Association | 研究生国际学生协会 |
| GISA | Grosse Ile Soccer Association (Grosse Ile, MI) | 格罗斯岛足球协会(密歇根州格罗斯岛) |
| GISA | Genealogiese Instituut van Suid-Afrika (South Africa) | 南非苏伊德非洲血统研究所(南非) |
| GISA | General Insurance Statistical Agency (Canada) | 一般保险统计局(加拿大) |
| GISA | Global Institute for Student Aspirations | 全球学生抱负研究所 |
| GISA | General Intelligent Software Agent | 通用智能软件代理 |
| GISA | German Information Security Agency | 德国信息安全局 |
| GISA | Geographic Indicator South Australia (wine making) | 南澳大利亚地理指标(酿酒) |
| GISA | Gestão Integrada de Sistemas de Arquivo | Gestão Integrada de Sistemas de Arquivo |
| GISA | Ground Intelligence Support Activity (US Army) | 地面情报支持活动(美国陆军) |