I think there's been some mention of this being a possible storyline in the past, but it seems to have now been confirmed that Michael will come out during the forthcoming tenth series of My Family.
What do fans think?
I'm a bit apprehensive as to how they can handle it without seeming to be re-writing the whole character ground-up. He's had a string of girlfriends in previous series, and even been portrayed as quite the 'ladies man' at times. I guess it could be done convincingly, if he has a gradual realisation of some form, but it'll be tricky.
https://www.comedy.co.uk/news/story/00000287/my_family_character_michael_is_gay/