I did it from Ponts to Gran Paradiso Summit and back to Ponts. I did it in Solo style without ropes and without support. A friend left to me my crampons on the ice part before the glacier. Then I put it to be safe running alone on the glacier. I chose the classic and long route that pass by Refugio Victorio Emanulle. It took to me 2h40 up hill and 4h03 up and downhill. The last female FKT in Gran Paradiso was also mine.