Hi! I have read about suksesfull keeping of the poison dart frog and geco's. But i dont know if it is possible with any kind of geco's.
However the geco keep't together with the frog was a L. Lugubris. pretty small geco. Nice specie indeed.(It's of course very important that the clima needs for each specie you keep together is matching so they won't suffer in wrong clima conditions). I plan to build up a terrarium with poison dart frog, L lugubris and some fish. Nice little co existing sosity.
Here is some wery good sites about the
L Lugubris and
Poison dart frogs .
Do some serious reading before starting up this eco system.
Good Luck!