Gary has to hide scripts from his mum
The former Hollyoaks star has joined the BBC One soap as city banker Danny Pennant, who causes trouble between Syed Massood and Christian Clarke.
He revealed: "My mum absolutely loves it, she was very excited when I told her I'd got the role. I had to tell her, 'don't you dare tell anyone'.
"I get the scripts delivered to my house, I don't get them delivered to hers any more. She used to sit and read all my Hollyoaks ones. She'd say, 'You know you're doing that next week' and I'd say, 'No, I didn't, but I do now'.
Gary, who grew up watching EastEnders, admitted his first day on set was an eye-opener.
"It was quite surreal on the first day, being on the Square and looking round, thinking 'There's the Queen Vic, there's Phil'," he said.
"It's a great opportunity to play something completely different and get your teeth into a different character, I've really enjoyed it."