What does GB stand for money?

Excuse me, could you clarify something for me? I'm a bit confused about the acronym "GB" in the context of money. Is this a reference to a specific financial term, a currency code, or perhaps a unit of measurement that's being used metaphorically? I've encountered many abbreviations in my work in the field of cryptocurrency and finance, but "GB" isn't immediately familiar to me in this context. Could you please elaborate on what it stands for when referring to money? Thank you for your help in clarifying this.