Sad I can't be there to celebrate with you and Mia
The 30-year-old said he was "sad" he couldn't be with her on her special day in view of his 578,000 followers.
The Spanish dancer has been forced to miss seeing his other half due to the BBC show.
Gorka and his partner Maisie Smith, 19, have formed a bubble in order to take part in Strictly due to the coronavirus pandemic.
This means the star is unable to see Gemma and their daughter, Mia, one.
Gorka Marquez missed Gemma Atkinson's birthday today
He shared a number of snaps of Gemma on the picture-sharing app, as he gushed about her in the caption.
Gorka stated: "HAPPY BIRTHDAY, BABY!
"Sad I can't be there to celebrate with you and Mia your day like you deserve."(sic)
He continued: "You are the most amazing mum and girlfriend in the world! Kind, funny, humble, caring, talented, strong.
"I am so grateful to have you by my side.
"I’m sorry I can’t give you a birthday kiss but you have my kisses forever. TE AMO."
Gorka then finished: "Feliz cumpleaños @glouiseatkinson."
Gemma soon replied: "I love you!"
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The couple, who met thanks to Strictly in 2017, were seen in a number of super cute shots.
The first saw Gemma kissing Mia's head, followed by her and Gorka cuddling up in their garden.
A third was of them smooching after what appeared to be a night out.
A number of Gorka's co-stars and pals also rushed to wish the blonde beauty all the best.
Giovanni Pernice stated: "Happy bday queen."(sic)
And Karen Hauer also wrote: "Happy birthday you gorgeous woman."
It has been a tough few days for Gorka, who found himself in the Strictly dance-off with Maisie.
Thankfully the pair were saved by judges Craig Revel Horwood and Anton Du Beke, after going up against Max George and Dianne Buswell.