The 28-year-old spent several weeks on the sidelines in September due to a calf problem but returned to the starting XI for the home victory over Ross County just prior to the international break.
He was then involved in three consecutive victories for Scotland and after a particularly impressive performance against Slovakia, many Bears expected him to start the Old Firm.
Yet, Gerrard opted for Steven Davis, Scott Arfield and Glen Kamara in midfield, before introducing Jack to help see out the final 30 minutes of the contest.
“I was disappointed not to play, of course, same with everybody else on the bench,” said Jack, as quoted by the Herald. “But it’s a team game and it’s how you channel that. You take the disappointment and when you get called upon to come onto the pitch you have to do your bit for the team.”
“To a man, I thought the full eleven was outstanding and then we had the boys coming off the bench to help. We have a strong squad. The midfield is always big in the game. You have always got to win the battle in the middle of the park.
“Celtic are very strong in there with international players but so are we. It was ways going to be an interesting battle in there but today we came out on top.”
Rangers star Ryan Jack responds to surprise selection call against Celtic – Verdict
It was a big decision to leave Jack out of the starting XI but it proved to be the right one, with the Gers dominating the middle of the park.
As the Scotland international pointed out, for all their problems elsewhere, Celtic had an experienced midfield lineup with Scott Brown, Olivier Ntcham and Callum McGregor, but they were all outplayed by their opposite numbers on the day.
With Bongani Zungu yet to enter the fray and Joe Aribo returning to fitness, Gerrard suddenly looks spoilt for choice.
As a top competitor, Jack will undoubtedly have been stung by his omission from the lineup. Yet, he still made a contribution as a substitute and will have a big role to play over the rest of the season if the Gers are to finally secure major silverware once again.