| Acronym | Definition |
|---|
| GISA➣Glycopeptide-Intermediate Staphylococcus Aureus |
| GISA➣Georgia Independent School Association |
| GISA➣German Information Security Agency |
| GISA➣Geographic Information Systems Association of Japan |
| GISA➣Genealogiese Instituut van Suid-Afrika (South Africa) |
| GISA➣Global Institute for Student Aspirations |
| GISA➣General Insurance Statistical Agency (Canada) |
| GISA➣Ground Intelligence Support Activity (US Army) |
| GISA➣Gestão Integrada de Sistemas de Arquivo |
| GISA➣Gemmology Institute of Southern Africa (Port Alfred, South Africa) |
| GISA➣Grosse Ile Soccer Association (Grosse Ile, MI) |
| GISA➣Geographic Indicator South Australia (wine making) |