The Class IX student was forcibly taken into a car by the three men in Chetna Nagar area on Wednesday evening, who gang-raped her in the moving vehicle and later dropped her at the spot from where she was picked, police said.
They threatened her against telling about the incident to anybody.
However, the girl mustered courage and informed her younger sister about the incident yesterday, who informed their parents.
The victim's parents then approached police and after her medical test, a complaint was filed against the unidentified youths late last night, police said.
Meanwhile, police were trying to contact the girl's friends in school in order to ascertain the identity of the culprits and trace them.
Nashik Police Commissioner Kulwant Kumar Sarangal and Deputy Commissioner D S Swami also met the girl's parents and assured them speedy action in the case.