I think you might mean GaN which is a different semiconductor material they're using in some power supplies.
GAA stands for gate-all-around and describes the geometry of the transistors (the gate surrounds the channel on all sides, FinFET was just surrounding it on 3 side) not what they're made of
dreamwavedev t1_j0abb8c wrote
Reply to comment by Mango1666 in Japan to Manufacture 2nm Chips With a Little Help From IBM by Avieshek
I think you might mean GaN which is a different semiconductor material they're using in some power supplies.
GAA stands for gate-all-around and describes the geometry of the transistors (the gate surrounds the channel on all sides, FinFET was just surrounding it on 3 side) not what they're made of