| Acronym | Sense | Language | Topics |
|---|---|---|---|
| GSO | Glandular sensory organ(s) | In English | → Biological sciences → Anatomy |
| GSO | Ground Support Office | In English | |
| GSO | Ground Support Operations | In English | |
| GSO | Ground Systems Operations | In English | |
| GSO | Gaz du Sud-Ouest | In French | → Energy economics |