| Acronym | Definition |
|---|
| PGSI➣Problem Gambling Severity Index (social sciences) |
| PGSI➣Polisportive Giovanili Salesiane International (Italian: International Salesian Youth Sports) |
| PGSI➣Persatuan Gulat Seluruh Indonesia (Indonesian: All-Indonesian Wrestling Managers Association) |
| PGSI➣Plate Glass and Shatterprufe Industries (South Africa) |