Let's assume that all are trying for free upgrades from B M H Q K L U T fares based on status. Before the gate, if on the same PNR, the GM and companion clear together after the FO at the companion window. If not on the same PNR, GM clears before FO at GM window, then FO at FO window, then companion at companion window. At the gate, whether or not on the same PNR, passengers are listed by their own status, so it's GM > FO > companion.