Are they mutually exclusive?
I don't hold any gods, myself, and evolution is not a theory. The only thing theoretical about evolution is some of the small details about how it works. THAT it works is being proven all around us at every moment.
But then again, the question should be did God etc. or do I believe in the big BANG. Evolution isn't the process of forming the world.
Only someone who didn't know squat about evolution would ask such a question. Sorry.