|effects||Ability to skin geckos for sale|
Gecko Skinning is a Fallout 2 perk.
This is a special Perk, so it cannot be taken at new levels like other Perks. It can be learned only from Smiley the trapper after you rescue him from Toxic Caves.
You know how to properly skin geckos (except for fire geckos) for gecko pelts and golden gecko pelts. You can then earn a bit from selling their skins.
In a fan made expansion, you are also able to skin fire geckos. This ability is standard in Fallout New Vegas, but whether it's still a 'perk' is debatable.