[1] Gore was a strong supporter of Governor Bligh and aided him in his efforts to reform the corrupt administration of the officers of the New South Wales Corps.
This led to the Rum Rebellion of 1808, where Macarthur and his co-conspirators in the New South Wales Corps mutinied against Governor Bligh and placed him under arrest.
In a show trial where Gore refused to plead due to the illegality of the court, Lieutenant Anthony Fenn Kemp found him guilty and sentenced him to seven years transportation to the convict settlement at Newcastle.
[2] He laboured in Newcastle as a convict for two years digging coal before being ordered to England to act as a witness in the court martial against Major George Johnston who was in charge of the New South Wales Corps during the Rum Rebellion.
[1][3] Governor Lachlan Macquarie who took control of the colony in 1810, declared all trials held by the New South Wales Corps as invalid and re-appointed Gore to the position of provost marshal in 1812.
A year later, Macquarie gave Gore a land grant of 150 acres on the northern side of Sydney Harbour.
The soldier, Andrew Beattie of the 48th Regiment, was on grass-cutting duty near Artarmon and Gore wounded him with bird-shot from a fowling rifle when he suspected him of stealing his grass.