Freddie Gibbs, 33, was seized just before he was due to go on stage in Toulouse after Austria issued a European arrest warrant for him.
Austria wants to extradite Gibbs to the country to face trial for the attack that allegedly took place in a hotel in Vienna in July 2015.
The rapper, who is signed with ESGN Records, had been performing last July in Vienna's Grelle Forelle club.
He reportedly invited two female fans backstage after the show, where authorities believe he gave them knock-out drops that made them become dazed and drowsy, according to APA.
The two women then went back to the hotel where Gibbs and his crew were staying, which is when the rapper and one of his security staff allegedly took advantage of their impaired state and carried out the attack.
After one of the women remembered the incident she went to the police who began investigating Gibbs and his employee.
Gibbs has denied all charges and according to his lawyer will be fighting extradition to Austria.
He was released on €50,000 bail and had his passport confiscated to prevent him from fleeing the country while the case for extradition is being heard. He also must report to French authorities three times a week.
The security staff member who is also accused is not with Gibbs on his current tour in Europe, and has not been seized.