I have been keeping frogs for a good 2-3 years now and I have had tons of pacmans and everyone I have bought them frog has said to keep them by themselves. A gecko would not get along with any kind of frog. They have different habitat needs and is best to house them in separate enclosures. Pacmans especially have be notorious for eating anything they can catch, and have been known to even attack a human finger cleaning the cage. One should not even entertain keeping any species with a pacman, especially a lizard or snake with a long tail it could fit into his mouth.

People have had success with a Whites Tree Frog in a tank with other reptiles, but you should monitor them closely to make sure there is no violence. Also, it is recommended that the gecko should be slightly larger than the whites tree frog, so that the frog will not consume it, but not too large that the gecko would be able to eat the frog.

Good luck with your amphibians and reptiles