| Acronym | Definition |
|---|
| GAR | Grand Army of the Republic |
| GAR | Gestion Axée sur les Résultats (French: Results-Based Management; various locations) |
| GAR | George A. Romero (film director) |
| GAR | Go Around (aviation) |
| GAR | Golden Age of Radio (radio show) |
| GAR | Gross as Received (energy value) |
| GAR | Gallatin Association of Realtors (Montana) |
| GAR | Gross Annual Revenue (various locations) |
| GAR | Green-Amber-Red |
| GAR | Groupe d'Action Royaliste (French: Royalist Action Group) |
| GAR | General Application Release |
| GAR | General Assembly Resolution (UN) |
| GAR | Great Aloha Run (Hawaii) |
| GAR | Gestion des Aides Régionales (French: Management Regional Aids) |
| GAR | Get A Room |
| GAR | Greater Asia Region (business region) |
| GAR | Groupement Ambulancier Roannais (French: Roannais Ambulance Group) |
| GAR | Great Astrolabe Reef (Fiji) |
| GAR | Grupo de Acción Rápida (Guatemala) |
| GAR | Governors' Annual Report (UK; Department for Education and Skills) |
| GAR | Government Affairs Representative |
| GAR | Global Alliance Realty (Japan) |
| GAR | Gagny Auto Rétro (French car associations) |
| GAR | Groupe Achat Recherche (French: Group Buying Search) |
| GAR | Guided Aircraft Rocket |
| GAR | Gateway Access Request |
| GAR | Governors Authorized Representative |
| GAR | Gate Acceptance Rate |
| GAR | GPRS Aggregation Router |
| GAR | Grow Analysis & Review |
| GAR | Guided Antiarmor Rocket |
| GAR | Gigabit Access Router |
| GAR | Grand Army of the Republic Band (Medina, OH) |