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I would go along with what Dyanaprajna said, but clarify terms. Devas and deities are not quite the same thing as a god. Its a weird language thing. Anyway, yeah, devas just had the karma to be born as devas. They live a long time, have lots of power and experience pleasure. It is taught that they are actually often quite ignorant though. Now, there are similar concepts to God in certain Mahayana schools.
It would not, however, be an individual, separate dualistic God, in the monotheist sense. Rather, it is the Adi Buddha or, original enlightened mind. That which all things emanate from. It is more panentheistic, but not actually panentheistic I guess. It is like God in an emanationist sense, but still not quite.
The first couple of paragraphs here would clear it up:
Adi-Buddha - Wikipedia, the free encyclopedia