Let's try this.
Before Isaac Newton decided that gravity existed, did people float around because there wasn't any gravity?
Nooooooo they did not.
So, if some tribe somewhere in the world had come up with a concept for something they kind of understood, which is what we call gravity now, would you have been able to ask your question but replacing the word "god" with "gravity" or whatever that tribe decided was the word?
Sometimes things explain what we kind of understand, but really don't understand. Sometimes that understanding is later proven false. But this very act is what has propelled humans to be the most intelligent beings we think have even existed on our ball of rock.
Gods have been a powerful force in human society. They have been the police force, the power structure, the unity and many other things.
Harry Potter EXISTS because we as humans have made him exist. He doesn't exist as a human being. He exists as a fictional character. But still exists.
Gods and God exist in a similar manner. But there are many, many definitions for what God or gods are. It's a little difficult to pin it down.
And, just as another little side note, I watch a nice little youtube video similar to this one,
YouTube I can't remember the exact name. Anyway, near the end when it's gone from galaxies, to super clusters and then shows a massive web of super clusters and the known universe, we don't know what's out there, and we certainly don't know if there are other universes.
So, how can we know if there's a God or gods out there, outside of the universe? We can't possibly.
