At the age of 18, she had her first breast augmentation and most expensive cosmetic surgery to date, which cost around £9,000.
Since then the 31-year-old has had a further two enlargements, going from a 34DDD to 34N bra size.
Gia, who lives in New York, also had lip implants and fillers, Botox, tongue bifurcation – where her tongue was split – and liposuction on her chin.
“I like to put my own grungy, erotic spin on the characters I portray”
She said: “I like to put my own grungy, erotic spin on the characters I portray.
“Body wise I think I fit in pretty well since a lot of animated females have pretty drastic proportions.
"The best body modification I've gone through, by far was my weight loss. I was confident even at 300lbs and still felt beautiful, but I felt trapped.”
Incredible images show Gia as Harley Quinn, Poison Ivy and even the Joker.
Gia added: “I didn't feel like my body was mine. It felt scary at times. I just didn't see myself that size.
"They were so beautiful and confident. How I feel now compared to before any surgery is more confident for sure.
“Plastic surgery is just body modification towards how you really see yourself and feel most comfortable. I feel my best when I feel I can see myself how I see 'me' in my mind.”
When asked if any of her cosmetic procedures have caused medical implications, Gia insisted that they haven’t, but says she needs a strong back to handle her implants.
Her future surgery plans involve getting a Brazilian Butt Lift, tummy tuck and more fillers in her breast implants – which she is now fundraising for on Go Fund Me.
“No medical issues, although I will say you need a strong back for implants like these. I would have issues if I didn’t make sure my muscles could handle them.
“Beauty is subjective. Some people wouldn’t agree with my preferred aesthetic with wanting extreme curves, but that’s what makes everyone so unique and interesting.
“It’s absolutely always important to be you and aspire to what makes you truly happy.”