Distant Planets, Distant Gods

In a recent conversation with a neighbor, we were discussing the possibility of intelligent, human-like life on other habitable worlds in the universe and he posed these questions:

If people did live on these distant planets, do you think they would have a god? And if so, would it be the same god as the “earthly” Christian god?

I told him I supposed it could be possible but I thought it highly unlikely since they too would have to have a “history” book on their god that was identical to the one “earth people” claimed.

What do you think?