Fact based. And you're asking about God. Good luck with that one. This is more SFA content I think.
Anyway, I just go with the idea that we, as humans, aren't advanced enough to understand how we got here. Nothing more to it. Maybe there is a God, maybe there isn't, maybe there are multiple Gods, we can't know for sure.
One must understand that the concept of God is what we don't understand.
There have been many gods since the beginning of time to explain events such as weather and the stars, or emotions and characteristics in Greece.
I personally understand that it is a highly accepted view of a big bang starting this universe. Whatever was there before the bang, a different dimension, gasses, a supernatural force, would be my definition of God.