Aww he's cute but doesn't look like he's doing fantastic. I would be super careful about having him in your house if you have other geckos. Whatever is bothering him could spread to your pets. Personally, I don't think wild geckos that are sick do well in captivity. Even though they would probably die in the wild putting them through the stress of living in a cage with huge "predators" around probably doesn't help. I know it sounds cruel but if the species is native to your area I would let him go and let nature take it's course