Speaking to glasgowwarriors.org, Gregor said: "There was fantastic courage shown by the players, I’ve got images of DTH van der Merwe really struggling with cramp and then making a 50-60 metre break, which almost led to a try and then getting back and putting in a crucial tackle for the team.
“Mike Cusack, who hasn’t played much this season, had to come on really early and did very well in the scrums and to still be tackling near the end was great to see.
"There were a few injuries and some guys came on early from the bench. Glenn Bryce got over his initial charge-down and scored an excellent try.
“Adam Ashe came on and carried really hard and it was great to see Henry Pyrgos back from injury and he got us into the position to score the try at the end.
"Peter (Horne) and Stuart (Hogg) orchestrated a lot of things in the first half and were mixing it up really well. The centres were excellent and I thought Richie Vernon looked really good starting his first game at inside centre.
“Peter Horne only found out yesterday he was playing stand-off and played excellent rugby. He was very committed with his tackling and running at the defence and had the confidence and ability to kick the final conversion, which was very important.”
Four games of the regular season remain and Gregor knows every point is crucial and with five teams chasing the four play-off spots.
He added: “The three points are crucial. When Leinster scored their fourth try to move ahead I was hoping that we would pick up a losing bonus point, so to come away with two extra points is fantastic.
“It’s going to be very tight with five teams chasing really hard for the top four places and the two home play-off ties. We’ve just got to make sure we prepare really well for each game and build on what we did last night.”
Glasgow return to action a week on Friday, when Cardiff Blues visit Scotstoun and Gregor Hopes his team can continue the run that has seen them go undefeated at home in the league since November 2013.
He added: “It’ll be great to be back at home in two weeks and it’ll be the first time since we played Montpellier in January that we’ll have our full squad available to us.
“We’ve only got two home games left in the regular season and it would be great to have a large crowd behind us.“