Also, entry into a lounge based on *G status is independent of the programme on which you charge your miles. Once your status is "confirmed" and you possess a gold card, you can enter A United lounge even if you fly TK in coach and credit the miles to M&M. The gold card card would not be necessary (depending on the lounge dragon, though), if you credit your miles to M&B, as this *G status would then appear on the boarding card.