A user today wrote $G^0$ (
G^0) to indicate standard Gibbs energy. I quickly edited it to $G^\circ$ (
G^\circ) instead as that's the notation I'm used to more.
However, then I realized an intriguing fact. Whenever I speak $G^\circ$ (in English at least) I say it as "G naught". I don't call it "G circle" or "G not" instead. The word "naught" in English means "nill", "nothing", or, well, "zero"!
Thus, based on its mode of speaking, it makes more sense to write
What is the standard LaTeX depiction of
G^0? And sister symbols like