The word alien defines a foreign being, while god(s) tends to be given the whole universe, hypothetically lacking any possibility of being alien. read more
And given the vastness of space and our own evolutionary model, an alien species one-million-years ahead of us might well fill the role of "God." But most people don't want to worship an alien. They want something supernatural - and a supernatural entity that exists outside of nature is, by definition, unknowable to science. read more
By definition alien means not of that place. since god existed before this universe and created it and is technically not of it yes god is ancient, eternal all powerful omnipresent, omnipotent, omniscient alien entity but not in the way space aliens are aliens. read more
No, by definition, God is not an alien. He is the supreme being the creator of the universe. read more