| Official Name: | Gaj |
| Native Name: | Гај |
| Settlement Type: | Village |
| Pushpin Map: | Bosnia and Herzegovina |
| Pushpin Label Position: | bottom |
| Subdivision Type: | Country |
| Subdivision Name: |  Bosnia and Herzegovina |
| Subdivision Type1: | Entity |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Nevesinje |
| Unit Pref: | Metric |
| Timezone: | CET |
| Utc Offset: | +1 |
| Timezone Dst: | CEST |
| Utc Offset Dst: | +2 |
| Coordinates: | 43.295°N 18.2847°W |
Gaj (Serbian: Гај) is a village in the municipality of Nevesinje, Republika Srpska, Bosnia and Herzegovina.[1]