I concur, it is a loaded question to begin with, and there have been countless wars over this, and that my God is the right God and your God is the false God.
There is no physical proof that there is a God. Also, which God do you mean, the Christian God? The Islamic Allah? Buddha? what about one of the Paganist Gods? Are you looking to find out which one God is the correct God?
The closest thing to prove I've seen on that is the South Park episode where Saddam goes to Hell, where they find that the Mormon was the correct religion.
That is why faith is used so much. because you can't prove it. You have to have faith to believe that there is a God, usually the one that you believe in.
What about the other side of it. Can you prove that God doesn't exist? You can't prove it that way either.
That is why people are allowed to believe whatever they believe. And I tend to believe that whatever they believe is true and correct and right for them.


