A teenager who filmed his family's violent reaction to his coming out as gay has received more than $100,000 in donations from strangers touched by his ordeal.

Daniel Pierce, 19, covertly recorded the shocking encounter with his father, stepmother, grandparents and aunt when they held a religious intervention with him about his "choice" of sexuality.

The family from Georgia in the US were mediating a "pray the gay away" with the teen after he came out to his stepmother last year.

Despite one family member admitting in the video that she knew Mr Pierce was gay since he was "a little boy", the family then proceeds to say his sexuality is "a choice".

"You can deny it all you want to but I believe in the word of God, and God creates nobody that way. It's a path that you have chosen to choose," the family member says.

"Since you have chosen that path, we will not support you any longer. You will need to move out and find wherever you can to live, because I will not let people believe that I condone what you do."

The prayer session quickly descends into chaos, as one family member rushes and beats Mr Pierce, who is called "a son of a bitch" and "a damn queer".

Mr Pearce was thrown out of his family home. His video was posted on YouTube on Wednesday and already has had more than 4 million views.

Mr Pierce's boyfriend helped set up a gofundme page to assist with the transition after his family threw him out without letting him take anything, including his college text books.

In two days, generous strangers have raised more than $100,000 to help support the teenager in setting up a new life.

Mr Pierce thanked his supporters with a vow to "pay if forward and hopefully turn something so negative into something positive".

Daniel Pierce was thrown out of his family home after a 'pray the gay away' session got out of hand (supplied). (Daniel Pierce was thrown out of his family home after a 'pray the gay away' session got out of hand (supplied).)

He praised the LGBT youth support group Lost N Found which helped share his video and offered him support following the confrontation.

Speaking with local news station WXIA, Mr Pierce said he hoped his experience would help others in similar circumstances.

"If one family watches it and maybe changes their mind about how they would handle their son or their daughter coming out…one family (if it) changes their mind I would be happy," he said.