G.B. Road (full name Garstin Bastion Road) is a road running from Ajmeri Gate to Lahori Gate, in Delhi, India. It is a large red-light district. It has several hundred multi-story brothels and there are estimated to be over 1000 sex workers. It is lined with two or three-storey buildings that have shops on ground floor. About twenty of these buildings have about 100 brothels on the first floor that open at night after the shops at ground level close. It is the biggest red light area in Delhi. The road's name was officially changed to Swami Shradhanand Marg in 1966.