Originally Posted by joseeantonior

Since it's an international segment, it won't have CPUs. So it'll only have instrument-supported upgrades and nonrevs on the waitlist. All instruments-supported upgrades go first, and the order is based by status (as symphonicman mentioned, your wife inherits your 1K status if in the same PNR), then fare class, then checkin time.

EDIT: Just to remind you, GPUs and miles-upgrades have the same priority, they are both instruments.