| Île Gaby | |
| Location: | Indian Ocean |
| Coordinates: | -49.65°N 115°W |
| Archipelago: | Îles Kerguelen |
| Elevation M: | 677 |
| Highest Mount: | unnamed mountain |
| Country Admin Divisions Title: | Terres australes et antarctiques françaises |
| Country Admin Divisions Title 1: | District |
| Country Admin Divisions 1: | Îles Kerguelen |
| Population: | 0 |
Île Gaby is one of the Kerguelen Islands near the coast of Grande Terre, the principal island.
It lies in the Swains Bay between the south-eastern part of the Gallieni Peninsula and the west coast of the Joan of Arc Peninsula, around 1 km SE of the Altazin Island.
The highest point of the island is an unnamed mountain that reaches the elevation of 677 m above the sea level.