The overall pass rate for Year 13 students was 99.3 per cent, with 79 per cent of grades at A* to C, and 57 per cent at A* to B.
The number of students getting either an A* or A also increased 8 per cent on last year to 29.6 per cent.
"The governors and staff at Glyn are delighted with the achievements of our students," Headteacher Phillip Wheatley said.
"These fantastic set of results mean our students have great future opportunities ahead of them, and I would like to pay tribute to my colleagues for their commitment to all Glyn students resulting in such success.
"We are also grateful to our parents for the support they have given to their daughters and sons over the years which has been significant."
Joe Gale, head of sixth form, added: "Special congratulations go to Pierre Garrido and Nicholas O'Donoghue who are off to study at Oxford University. It was also particularly pleasing that five students secured places to study medicine.
"We wish each of our 240 students the very best as they move onto the next phase of their lives, whether it is in higher education or employment."
For Pierre, who got A*s in physics and biology and an A in chemistry, it was a school trip to Oxford that inspired him to work hard for his place to study medicine at the university.
"Going to the best university that you possibly can is something that Glyn always pushes you to work for and I can't thank the teachers and staff enough for all their support," he said.
Meanwhile Nicholas, who will study chemistry at Oxford after getting an A* in maths and As in physics and chemistry, admits he'd been worrying about his results for the past couple of months.
"I had no idea what I would get but I was really pleased when I opened my envelope," he added. "I can't wait to go to Oxford because it's the best. I'm hoping that I'll be able to do a masters at Oxford after my degree and then perhaps go into research."
The school's top performer was James Morris who got four A*s and landed a place at the University of Warwick. Rohan Raymond and Jamie Perriman were next with their three A*s.
Roshan, who got A*s in biology, maths and chemistry, has secured a place to study medicine at Queen Mary University of London. He aspires to become either a doctor or a surgeon.
Other top performers included Ashtead brothers Thomas and Kieran Beeton. Thomas is looking forward to studying economics at Sheffield after getting A*s in economics and geography and an A in maths
Meanwhile Kieran is gearing up to study computer science at Nottingham after securing A*s in geography and sociology and a B in computing.
"We'd both checked our results online before coming in to collect our results so we knew we'd got into our first choice universities but it was still pleasing to get our results and see how well we did," Kieran said.
James Everson was another top performer and he can't wait to start studying medicine at King's College London after landing A*s in biology and chemistry and an A in pure maths.
"I wasn't particularly confident of getting these results but I'm glad all my hard work has paid off," he said.
As for his choice of university subject, he explained: "I really love science and medicine is a brilliant way of helping people and doing something meaningful."
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