The full form of G.B. Road is Garstin Bastion Road.

Garstin Bastion Road, popularly called as GB Road, is a road in the capital city of India. The road starts from Ajmeri Gate to Lahori Gate in Delhi parallel to the railway lines. The GB Road is also one of the largest red-light districts in the country. The area is covered with several hundred multi-story brothels where over 1,000 sex workers stay. The road is lined with two or three-storey buildings on both sides of the road that have shops on ground floor and hundreds of brothels on the first floor. These brothels come alive at night after the shops at the ground level close. The road’s name was officially changed to Swami Shradhanand Marg in 1966.