The victim, who hails from West Bengal, has alleged that she was raped by one Kapil and his associates, said ACP Rajesh Kumar, adding that the complaint came this morning.
A medical examination of the complainant has confirmed rape, he said.
According to police, the victim said that she knew Kapil and, on the day of the crime, had met him at a market from where they went to the guesthouse.
At the guesthouse, she alleged, six of Kapil's acquaintances entered their room and the accused then took turns to repeatedly rape her. She has also said in her complaint that the accused were carrying a firearm.