Gabrielle took the course, at the University of Law, along with her sister Kandi, who also passed her exams but at the ripe old age of 22.
The teenager, who is originally from Windermere, Florida, hopes eventually to be a fashion law specialist.
She said: “I am honoured to be the youngest person to pass the Bar exams but, really, I was not aware at the time what the average age was.
“I didn’t fully realise the impact of it.”
Gabrielle has already made history at her previous university, Liberty University in Virginia, where she was the youngest person to finish an undergraduate degree there, in psychology, at the age of 16.