G." Nelson (21 December 1881 – 26 April 1947) was an Australian politician and trade unionist who was the first person to represent the Northern Territory in the House of Representatives.
He arrived the territory in 1914 to work as an organiser for the Australian Workers' Union (AWU), and was a leader of the Darwin rebellion of 1918.
He subsequently served in the House of Representatives from 1922 to 1934, initially as an independent and then as a member of the Labor Party.