GNIS
| 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) |