| Acronym | Definition |
|---|
| GNIS➣Geographic Names Information System (US Geological Survey) |
| GNIS➣Geographic Names Information System |
| GNIS➣Geographic Names Information Service (USGS) |
| GNIS➣Guangzhou Nanhu International School (China) |
| GNIS➣Groupement National Interprofessionnel des Semences, Graines et Plants (French) |
| GNIS➣Good News Internet Services Inc. (Cincinnati, OH) |
| GNIS➣Global NDT Internet Superhub (NASA JPL) |