We broke the story ... Gia hanged herself in her New Orleans home. According to official docs -- obtained by TMZ -- Gia used a vacuum cleaner cord to end her life. It was tied to the center section of her spiral staircase and tied to the handrail on the second floor.
It appears Gia was on the phone with her mom when she hanged herself. Her mom told cops during the call the phone "had gone silent" and the mother tried in vain to communicate with her for 10 minutes.