Unfortunately, I think not :(
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No
Though it's never actually spelled out, it is hinted throughout the show that Bryn has certain gay tendencies.
No, Julian Barratt is not Gay, he has a girlfriend (Julia Davis from Nighty Night, Gavin and Stacey ect.) and the pair have twin boys together (Arthur and Waltor, born June 25th 2007).
Edward Everett Horton lived in a time when sexual orientation wasn't discussed publicly, but it's known that he had a male companion, actor Gavin Gordon, for many years, so it is likely that he was gay.
ACTUALLY Jonathan Groff is gay he even admitted he said he was truly "gay and proud" so the answer before was very much wrong.