I just noticed that if you replace "God" with "Big Bang", it's pretty much the same question. The answer to Big Bang is that before it, there was no time itsel

I just noticed that if you replace "God" with "Big Bang", it's pretty much the same question. The answer to Big Bang is that before it, there was no time itself, so there's no notion of "before" (or if you wish, it's an error in the question itself that assumes there was "before").