A battling Treviso looked to have snatched a draw before a late try from Rory Clegg secured the full five points for the Scotstoun men.
"We had to dig deep and show character," said Gregor in today's Herald. "The try that the guys produced at the end was brilliant, fitting of a courageous away win. We have a really good record in Italy, we have not lost here in the last five or six years so it says something about this group that even when things were not going for them they can come back and get an important win.
"To get maximum points is really important for us, we are going to have to keep these wins going if we are going to stay in the top four.
"That squad today had 12 changes from last week, it shows we can use 35 players over a couple of games. That is something we are going to have to do during the Six Nations and beyond. For a first hit-out for that team, there were a lot of positives - a number of things we are going to have to work on but to score five tries was great."