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.

References

Kerguelen islands map
Géoportail IGN.
General view of non-metropolitan France
Maison de la Géographie. Gaby {{FrenchSouthernTerritories-geo-stub