The pair - who are official boyfriend and girlfriend - made it to the final of this year's series.
They finished fourth in last Monday's live show and now on the outside, Gabby has shared some shocking comments she's been receiving.
Posting screenshots of the disgusting messages online, Gabby revealed: “Right guys so I have been reading through some of the messages I’ve received over the past few weeks and I’m absolutely horrified at the amount of disgusting racial abuse due to mine and Marcel’s relationship.
“Its completely unacceptable and to know that this is still goes on in 2017, it breaks my heart. I’ve grown up in multi-cultural and LGBTQIA environments all my life. To know that this is still a thing, I’m mind blown.”
Gabby continued (via The Mirror): “Hopefully it doesn’t, but if it continues I’ll have no choice but to publicly name and shame every single one of you. I will show you one or two just so you can see how disgraceful it really is.
“Sorry for any distress this might have caused anyone, as you can see, behind the scenes isn’t always that pretty. But thanks for the support, aside from this. I get to see my boy tonight and that’s all that matters.”
The latest abuse follows Gabby receiving death threats from people claiming she's 'faking it' with Marcel.
Speaking to the Daily Star after leaving the villa, Gabby revealed: “I couldn’t believe my phone when I came out.
“I’ve had death threats. I’ve been told to kill myself. It’s crazy.”
She went on to insist her feelings for Marcel were genuine and the pair were planning to stick together on the outside.
Gabby said: “We are strong and we are going to be together.
“I could have chosen to go with someone else who came in the villa but at no point did I want to jeopardise what I have with Marcel.”