The teenage goalkeeper signed his first professional contract at the Academy in January and enjoyed significant time with the first-team squad in the second half of the campaign following injury to Mason Munn.
Training alongside the experience of Jack Butland and Liam Kelly, the 16-year-old says he was keen to soak up every minute.
Speaking to the official Rangers website, McGuire recalls his initial first-team exposure: “I was nervous when I got told.
“It was a joy to train with them, and I was involved in the whole team on the Wednesday.
“It was good to train with Jack [Butland] and Liam [Kelly] for the first time.
“I had my first first-team experience in October. I broke my finger in September after I was called into the Scotland squad; it actually happened on the day the squad was announced.
“I was a bit gutted with that, but I came back after four weeks and my first day back was actually with the first-team.
“I went back to the Under-18s, played well and got experience in the SPFL Trust Trophy where I was on the bench for the Glasgow Cup final.”
Although it’s the ambition of every youngster at Rangers, joining up with the first-team can be an initially daunting experience.
McGuire grew up watching Jack Butland star in the English Premier League, as well as Gers Hall of Fame goalkeeper Allan McGregor who, alongside Conor Brennan, formed part of Barry Ferguson’s coaching staff this past campaign.
He continued: “I was a little bit nervous going round the first time with Allan McGregor. He’s actually quiet and not what people perceive him as.
“He did give me a few tips, but he left it to Jack a lot. I would say Jack probably coached me the most.
“He gave me a tip in training once when we were doing a finishing drill, and I felt so different after.
“I took it into Under-18s games and felt so much better; making saves that I wouldn’t ordinarily make.
“It was all about my positioning in the goal and Jack gave me some advice.
“The goalkeepers were top with me. As a young goalkeeper you feed off them and you learn as much as you can. They are two great role models for me.”
McGuire, however, is also grateful to a player only two years his senior, Mason Munn, who has established himself in the first-team goalkeeping unit over the last 12 months.
Munn made a strong impression with his outstanding individual performance in the Scottish Youth Cup final last year, and McGuire says he has been inspired by the Northern Ireland youth international.
He added: “I look at Mason and he had a very good Youth Cup final performance.
“He made himself a first-team player over pre-season and got his spot in the dressing room.
“He obviously hasn’t played a lot of games, but he’s still among the first-team and I look to him.”
The high note in McGuire’s debut campaign was undoubtedly lifting the Glasgow Cup in April.
It made it even sweeter that, only four months prior, McGuire was on the substitutes bench for the previous season’s Glasgow Cup triumph.
The young goalkeeper also believes it was just reward for the young side’s hard work and application this past season.
He added: “Being on the bench for that game, to starting in it recently, was a bit of a rollercoaster in itself, and it was good to come out on the right end of it.
“I didn’t expect to play in the [December] Glasgow Cup final because it was a senior squad where you probably wouldn’t have a 16-year-old on the pitch.
“But to play in the next one, when we had two 16-year-olds on the pitch with myself and Aiden McCallion, just capped off a great season.
“I’d say the Glasgow Cup final was the highest point for me in the season. We fell short in the league which isn’t good enough, but getting that trophy was a real high point.
“Winning a trophy at Rangers is a dream at any age.”