| Acronym | Definition |
|---|
| GNB | Greensburg (Amtrak station code; Greensburg, PA) |
| GNB | Guinea-Bissau (ISO Country code) |
| GNB | Good News Bible |
| GNB | Geographical Names Board (Australia) |
| GNB | Gas Non-Blowback (pistol) |
| GNB | Gaussian Normal Basis |
| GNB | Gender Non-Binary |
| GNB | Goliath National Bank (How I Met Your Mother fictional bank) |
| GNB | Gram-Negative Bacillus |
| GNB | Group of Notified Bodies |
| GNB | Gardner National Bank (Gardner, KS) |
| GNB | Grenoble, France - St Geoirs (Airport Code) |
| GNB | Graphical Network Browser (Nortel) |
| GNB | Global Networked Business |
| GNB | Ging Nang Boyz (band) |
| GNB | Gould National Batteries, Inc. |
| GNB | Gesellschaft für Nuklear-Behalter, MbH |
| GNB | Great North Badge Company (UK) |
| GNB | Gears and Beers |