Moray suffered medial ligament damage to a knee in the defeat to Scarlets in September, but says he is now ready to put 10 weeks of injury torment behind him.
Moray told the Evening Times: "Although injuries are part and parcel of professional rugby, this one was a really frustrating affair.
"To find myself sidelined for 10 weeks just a fortnight into the season was a real hard one to take, but it is at times like that when you have to be at your most professional.
"So I was determined to do my rehab as best as I could and now we have some huge games coming up and I am back in the frame at exactly the right time.
"So I just want to get out there and get back into the games and do my best for Glasgow.
"A lot of people tend to say that the last six weeks of the campaign is the business part of the season, but I am not so sure I agree.
"You look at the games we have coming up and how we go in them will pretty much decide how the PRO12 pans out and definitely whether we stay involved in Europe in one form or another.
"So for me Leinster is massive because it is both at home and can give us the best possible platform into the key part of the season."