Although Territory Labor's landslide victory in the 2016 election was beyond doubt, a number of prospective ministers—including Labor deputy leader and presumptive Deputy Chief Minister Lynne Walker—had not been confirmed as winners in their seats. For this reason, Gunner had himself, Natasha Fyles, and Nicole Manison sworn in as an interim three-person government on 31 August 2016 until a full ministry could be named.
Minister for Police, Fire and Emergency Services Minister for Tourism Minister for Northern and Central Australia Minister for Economic Development and Major Projects Minister for Indigenous Affairs Minister for Correctional Services Minister for Business Minister for Racing, Gaming and Licensing Minister for Asian Engagement and Trade Minister for Employment and Training Minister for Public EmploymentMinister for Corporate and Information ServicesMinister for Multicultural Affairs Minister for Defence Industries Minister for Senior Territorians Minister for Lands and Planning Minister for Mines and Energy Minister for Children and Families Minister for Health Minister for Disability Services Minister for Mental Health Services Minister for Education Minister for Transport Minister for Infrastructure Minister for Essential Services Minister for Veterans Support Minister for Primary Industry and Fisheries Minister for Land Resource Management Minister for the Environment Minister for Arts and Museums Minister for Sport and Recreation Minister for Young Territorians Minister for Local Government and Community Services Minister for Housing Minister for Parks and Wildlife Minister for Men's PolicyMinister for Women's Policy Minister for Statehood
On 11 September, the following members were announced as ministers after a Labor Party caucus meeting. By this time, it had been confirmed that Walker had lost her own seat, so Gunner tapped Manison to become the new deputy leader of Territory Labor and hence Deputy Chief Minister. Gunner also announced that all backbench members of his large caucus will serve as junior ministers, at no extra cost to taxpayers. The new cabinet was sworn in the following day. Notably, it was majority-female; five of its eight members were women.
Gunner's second arrangement of his cabinet was announced and sworn in on 26 June 2018. Selena Uibo was promoted to the ministry as Minister for Education and Training.
The third arrangement of Gunner's Cabinet, occurring on 21 December 2018, saw Ken Vowles being expelled from the Cabinet for "breaking cabinet confidentiality". Assistant ministers Jeff Collins and Scott McConnell losing their roles and Paul Kirby joining the ministry as Minister for Primary Industry and Resources.