The 29-year-old was reportedly found hanging and unconscious by her NBA player boyfriend Ryan Anderson on Monday, who called an ambulance straight away.
The reality star was put on life support, and remained in critical condition until yesterday, when her family released the tragic news that she had died.
'Due to a critical loss of brain and organ function, life support was withdrawn today,' a statement from her family read.
[ASSETHERE=image]
'Ms. Allemand passed away peacefully with her mother, boyfriend, and other life-long friends by her side. As a practicing Christian, Gia did receive the sacrament of last rites.
'Loved ones and fans will remember Gia Allemand as a caring woman who loved her family and was well-known for her compassion towards animals and mission to rescue homeless pets.'
In a heartbreaking statement Ryan paid tribute to his girlfriend, saying:
'Gia was the most beautiful person I knew inside and out and she always smiled and made everyone else around her smile. She had such an amazing impact on my life and anyone that knew her was blessed.
'I'm deeply grateful for all the love and support we have received from family, friends and fans.
'All I have left is to cherish those memories we made together and help perpetuate the many values, faith and love that we shared.'
Gia's model and acting career also included a runner-up place in both the Miss Hawaiian Tropic competition and Miss Red Hot Taj Mahal Super Bowl contest, a cover in men's magazine Maxim, a Miss Bikini-USA's Model of the Year prize and a main role in a Brett Ratner produced film about the life of actor Gianni Russo.
Season 14’s Bachelor winner, co-star and friend Vienna Girardi described her shock and incomprehension at Gia’s suicide, revealing:
'Gia was a beautiful girl and an unbelievable friend. I’m shocked and can’t believe what happened to her. She seemed so happy, but you never know the demons people are fighting inside. I will never forget her and will miss my friend forever.'