I would be pretty shocked at first, angry too. but i would eventually accept it, but i would never bring myself to worship it/them.
I can't help but be reminded of my favorite quotes:
“How gullible are you? Is your gullibility located in some "gullibility center" in your brain? Could a neurosurgeon reach in and perform some delicate operation to lower your gullibility, otherwise leaving you alone? If you believe this, you are pretty gullible, and should perhaps consider such an operation.”
~ Douglas R. Hofstadter
If there's a god, it is bat-shit crazy or else how is described by the devil in Devil's Advocate, an absentee landlord. I see little chance for such an entity to exist, given our universe. If shown to us, we'd probably see it as an advanced life-form and little more.
In other words, many of us have outgrown the concept.
I would take the late Christopher Hitchens' lead and hope that whatever this "god" is would prefer honest disbelief to dishonest belief "just in case".
Live a good life. If there are gods and they are just, then they will not care how devout you have been, but will welcome you based on the virtues you have lived by. If there are gods, but unjust, then you should not want to worship them. If there are no gods, then you will be gone, but will have lived a noble life that will live on in the memories of your loved ones.
die and see
My answer to that question is simple: christians claim that god makes us all exactly as we are. That being the case, it means that he knew while creating us that we'd doubt, that we'd ask questions and that we'd stop believing.
Why would he punish you for being exactly the creation he made?
if there is a "god" atheist will be the first to know it. christains just are not smart enough.