You won't get upgraded if it's a full flight and most biz seats are paid for, even with GPU. With gold especially unlikely, that will put you in the middle of a

You won't get upgraded if it's a full flight and most biz seats are paid for, even with GPU. With gold especially unlikely, that will put you in the middle of a usually 50 person waitlist for 3 or 4 available seats. All depends on how busy chosen routes are.