When Am I getting Promoted

[Ryans]

GC ranks are tied to levels, so you can expect the next rank to be available once you can level pass 50 (in 3.0).

GC rank isn't tied to level. They already posted a picture of the next rank in the last patch notes (2.4) but redacted the picture. I'm assuming it will be released before 2.5. Could be as soon as the December 9th update.