The incident happened last evening when the girl went to a nearby forest area to attend the call of nature where four youths caught her and gangraped her at gun-point, police said.
The accused, all within the age group of 20-25 years, were indentified as Gautam, Avneesh, Sunil and Bhure.
They also threatened the minor of dire consequences if she narrated the incident to anyone, police said, adding the accused youths later fled the spot leaving the victim in an unconscious state.
When the girl regained consciousness, she went back and revealed her ordeal to her parents, following which a case was filed against the four youths, police said, adding, they will be nabbed soon.