Gemma shared a series of photos of the couple together as she admitted they would not be spending his big day together.
In view of her 1.5 million followers, the former Hollyoaks star penned a heartfelt birthday message.
She penned: “Happiest of Birthdays to you Gorks! Sending you all the love and happiness you deserve.
“Sorry we can’t be together today or fly in your family and friends and celebrate with a mammoth 30th party as we planned.”
The final post was a heartwarming video of the Strictly pro cradling baby Mia in his arms, which she captioned: “And more family days.”
The sweet birthday post comes as Gorka gears up to take part in the new series of Strictly, which is set to return next month.
Meanwhile, Gemma recently revealed she isn’t focused on tying the knot with her partner.
“People are always commenting on our Instagram photos with ‘Put a ring on it,’ and I think, ‘Shouldn’t you ask if I want to get married? No, I think how we are is perfect,'” she said to HELLO! in June.
The star went on to say that she thinks not being married is preferable for now, admitting: “We both like the fact that it keeps it fresh and keeps us on our toes.”
Elsewhere, the mum-of-one recently had some exciting news to celebrate as she confirmed that she will be joining Steph McGovern on her new Channel 4 show.
Steph’s Packed Lunch, which will feature a mix of television personalities and chefs, will air later this month.
She wrote online: “I’ll soon be joining Ch4’s new daytime show ‘Steph’s Packed Lunch’.”
The former Strictly finalist added: “A few times a week I’ll be joining Steph McGovern chatting away.”