The station serves the Metro North West & Bankstown Line, with services operating between Sydenham and Tallawong.

[3] As the tunnel had to be bored above the Cross City Tunnel,[4] the platforms are 17 metres (56 ft) below Park Street and 20 metres (66 ft) below Bathurst Street,[3] making Gadigal station the shallowest station on the City & Southwest project.

[5] The contract for the excavation of the six stations and twin 15.5-kilometre (9.6 mi) bored tunnels on the Sydney Metro City and Southwest project was awarded to a joint venture between John Holland, CPB Contractors, and Ghella in June 2017, for A$2.81 billion.

By April 2018, all eight buildings at the station's northern entrance had been demolished, the tallest of which was fourteen storeys.

An acoustic shed was built over the sites to limit the impact of construction noise on surrounding areas.

After undergoing maintenance, the TBMs continued tunnelling north towards Martin Place station.

[18] By November 2022, the platform screen doors were in place and the southern entrance building's structure was complete.

However, in February 2022, two months after David Elliott was sworn in as the new transport minister, he intervened to propose the station be named after Indigenous army officer Reginald Saunders.

[25][26][27] There will be an over-station development at the northern and southern entrance, constructed by Oxford Properties and CPB Contractors.