Found a Gray tree frog in a house plant, please help!

[Herpin Man]

The frog isn't hibernating, however it may be somewhat lethargic due to the cool weather and short days. You don't need a heat lamp unless your house is exceptionally cold. Too much heat isn't good for this species, and a heat lamp will dry out their enclosure.
You should study this care sheet:
https://ourreptileforum.com/communit...e-frogs.17159/

Meal worms are a poor food choice, crickets are much more nutritious and appealing to the frogs. It may not eat much this time of year.
Under no circumstances should you ever release this frog. For one, that is a good way to introduce disease and pathogens into the wild population. For another, it may not survive the new habitat. And, since you don't really know where the frog originated, you would be causing genetic pollution of the local frogs, if the released frog reproduced with them.