The nominations for the 2014 BAFTA Awards were announced on Wednesday, with Glenn and co-writer Colin Carberry shortlisted for the Outstanding Debut by a British Writer, Director or Producer category.
Good Vibrations tells the story of music fanatic Terri Hooley, played by Richard Dormer, who opens a record store in Belfast during the height of the Troubles.
Speaking to UTV Live Tonight, Glenn admitted his surprise to be nominated for the prestigious award.
"I got a call from Colin (Carberry) at half past 7 this morning to say we had been nominated, which was a lovely surprise on a very dull January morning," he said.
"It's great; the film has had a longer life than any of us expected.
"It's great that it was released and received so well, so for it to go into 2014 with still a little bit of life in it is good.
"We just thought it was a great story, but we didn't want to do it if Terri wasn't happy with it. And we made a film that had Belfast producers, Belfast directors, the scriptwriters are from Belfast and it's based on somebody from Belfast so it was fantastic that we were able to do that."
The real-life Terri Hooley admitted he was "very proud" of the movie, which has received huge critical acclaim since its release.
"I think (the film) is very true to life," said Terri. "I didn't want it to be a glossed over movie, its warts and all.
"The first time I saw the movie I cried and I've cried every time since. What an idiot I was," he laughed.
"I'm very proud of it because it took a long, long time.
"I never thought I would be around to see the movie and then for it to win awards around the world it's great.
"I mean, if you flying from Australia or Asia, you can watch it on the plane."
Glenn and Colin will compete against four other writers, directors and producers for the award with the winner announced at a star-studded ceremony in London on 16 February.