My response is not going to be a popular one, but here goes:

What you have there is a Cuban tree frog. And invasive species in the United States and very problematic in Florida. If you are planning on keeping it as a long term pet, then by all means, take it to a vet and give it a proper home. If you are planning on rehabilitating it to return it to the wild, don't. Florida fish and game has declared it invasive and they are to be euthanized on sight. While I do not condone the euthanized of any animal intentionally, I believe in it for invasive species. If you are not planning on keeping it as a pet, I recommend euthanizing it. If you find yourself unable to do it, please have someone else. Do not return it to the wild.

Like I said, this will not be a popular post, but it is my brutally honest opinion.