Several years before the Grand Chord was built, a connection from the Howrah-Delhi main line to Gaya was developed in 1900 and the South Bihar Railway Company had laid a line from Lakhisarai to Gaya in 1879. The Grand Chord was opened on 6 December 1906. ;New developments In February 2012, The Indian Railways had planned to set up a Railway StationDevelopment Corporation that will work on improving the major railway stations including Gaya Junction by building and developing Restaurants, shopping areas and food plaza for commercial business and improving passenger amenities.
Facilities
There are 9 platforms in the Gaya Junction and the platform 10 is under construction. There are 1 Pilgrim Platform also, where the pilgrim train stop. The platforms are interconnected with foot over bridges. It has three foot over bridge, the station houses all the major facilities like waiting rooms, computerized reservation facility, food plaza, dormitory, retiring rooms, cafeteria, bookshop, etc. Existing facilities are being revamped for developing it as model station.
Trains
Gaya Junction's location on the Delhi Kolkata Grand chord route, makes it served by numerous express and superfast trains from all over the country. Gaya Junction is the second most important railway station in Bihar after Patna and second largest in terms of platforms after Patna Jn. It is a junction and is connected to all the major cities such as New Delhi, Kolkata, Mumbai and Chennai through important broad gauge routes. Now it is also directly connected to Guwahati. There is a direct train, Mahabodhi Express from New Delhi to Gaya daily. Another air conditioned train Garib rath has been added from Gaya to Anand bihar Jn,which runs weekly. There are direct trains from Gaya to important stations in India like Delhi, Kolkata, Chennai, Kamakhya - Guwahati, Ranchi, Parasnath, Bokaro, Varanasi, Lucknow, Kota, Kanpur, Allahabad, Agra, Bareilly, Mathura, Jabalpur, Bhopal, Indore, Nagpur, Mumbai, Pune, Puri, Ahmedabad, Jodhpur, Amritsar, Dehradun, Kalka, Jammu, Gwalior, Dehradun, Jamshedpur, Bhuvaneshwar, etc. Several electrified local passenger trains also run from Gaya to neighbouring destinations at regular intervals. Gaya Patna daily bond passenger train also plays a very essential role in city. The train starts from Gaya Junction to Patna Junction via Bela, Chakand, Jehananbad, Makhdoompur.