pretty close, except 神马 actually means Godly Horse, 神么actually means God? Not really funny when I explain it out, it's the typo and pronunciation variance that's kinda funny.
Literally, "神" doesn't mean "God", "God" in Chinese is "上帝".
I'm a native Chinese.
On the other hand, IMHO, just IMHO, "God" being translated into Chinese(Cantonese) as "神" is not thoughtful as it introduces confusion.