Up until very recently, G fares were the rock bottom fare buckets on United.com. However something changed within the last few days, as I am now seeing N as the lowest fare. And at least for one of my reservations that I had booked in G, the same exact itinerary now shows up as N, even though the $ amount is the same. Not sure what the practical implications of this change are aside from wedging up W fares for those that want to use a SWU GPU for an international itinerary. Anyone else seen the N fares popping up?