I have some GPUs expiring in January, and with no planned international flights coming up, I'm getting desperate to use them. So I've begun using them as I would RPUs. I have a same day mileage run coming up: PHL-SFO-LAX-DEN-PHL. Due to a quirk, the system lets me apply one GPU to this FOUR segment itinerary (maybe because it's same day?). I'd love to do my run in First class. But I'm worried that only the short SFO-LAX segment is going to clear, thus consuming my entire GPU.

1) Should I try calling the 1K desk and have them apply the GPU to only the other segments? (risking them denying me the application on FOUR segments) or
2) Just apply the GPU to the entire itinerary, sit back and wait, and enjoy the ride--whatever clears, clears?