I think Gary can come across badly in interviews because his responses sound so rehearsed. He’s always sounded like a fifty year old man, even when he was 22.
He’s very guarded and doesn’t like to let people in. If Robbie is an open book, Gary is the opposite. I think he carries a lot of baggage from his “failure” years and still isn’t over the trauma of being a public laughing stock.
He’s also a workaholic and when TT aren’t active, needs to be busy with solo projects. I don’t think that means he’s only in it for himself, I genuinely think the three of them are in a good place in their old age.