If God is omnipresent then God transcends all reality. Although God declares that man must worship no other god, all the other gods are God. Because of God’s omnipresence, God can be all the gods in a pantheon. For example, God is Odin as well as Thor. There is a separate distinction in the Norse mythology. However, because God is omnipresent, God can easily be both Odin and Thor.
When a new belief is born and a new god is created, God takes on that persona when it is necessary.
Therefore, it doesn’t really matter who your deity is, they are all the same omnipresent and omnipotent being whether you call it God or not. The concept is rather simple but complicated at the same time.