Fans were quick to question the model and actress on her 'secret' to weight loss, and she answered saying she had been 'very sick.'
'You inquiries about my health and also about my happiness is so really special and not lost on me,' her post read.
'I’ve been very sick but getting better now thank god.'
While Gab didn't go into detail, she previously shared with fans that she had been diagnosed with toxic shock poisoning in January.
Fans were quick to send Gab their well-wishes.
'So glad to hear your better,' one fan wrote, with another adding, 'Good luck with everything Gab.'
Sending love!