Found 5 full forms for GNIS
| Term | Full Form | Category |
|---|---|---|
| GNIS | Geglobal Ndt Internet Superhub 
| Others |
| GNIS | Geographic Names Information System
| Others |
| GNIS | Geographic National Information Service
| Others |
| GNIS | Global Names Information System
| Others |
| GNIS | Global Ndt Internet Superhub
| Others |