Two things - There's nothing special about that signature vs any he's given in recent years even if it was authentic, which it most likely isn't.
Second - take a hard pass on Aaron Rodgers anything that has a Global sticker (or any other autograph for that matter). They've authenticated every garbage AR sig under the sun and even if by some miracle that was real, their opinion is in such low regard by knowledgeable collectors that you have a devalued sig in any case.
I think it's fair to question any seller who actively used Global to authenticate their items. Those are stickers to avoid.