Here, intonation is everything. God/Man is pronounced at a high pitch, depending on your level of excitement, and the next word follows immediately at your lowest pitch, and the rest of the statement stays on that low pitch... no matter how long it is! For example, God/Man, she irritates me when she talks like that! Note that there's no pause between God and she.
Also note that Man as an exclamation has nothing to do with the gender of the person you're speaking to. It can be used with women and children because you're not using it to address them directly.
God, this cake is good. Did you make it or is it from the store?
When he told me he was a birdwatcher, I'll admit that I kind of chuckled to myself. Not in a mean way... more of in a "how adorable!" kind of way. God, that sounds condescending! Well you know what I mean.
It may help others if you translate the snippets into your own native language. Tell us below. And please don't forget to vote if you enjoyed this page.