The armoury is named for George Taylor Denison III, a Canadian Militia commander, judge and Toronto alderman.

The current armoury replaced the previous location at Dufferin Street at Highway 401, built in 1961 and demolished in 2003, now site of Costco's Downsview store.

[1] After the closure of CFB Toronto, now Toronto/Downsview Airport, the armoury was relocated next to the new site for Land Force Central Area.

In addition to the headquarters elements, the armoury also serves as the home to several Primary Reserve units, including the Governor General's Horse Guards, the 32 Combat Engineer Regiment, the Area Support Unit for 32 Canadian Brigade Group, and several cadet corps/squadrons of the Canadian Cadet Program.

Large centrally located building with low-pitched gable roof houses 32 Canadian Brigade Group Headquarters; The Governor General's Horse Guards; 2 Intelligence Company; 32 Combat Engineer Regiment; 32 Service Battalion; 32 Military Police Platoon; 2 Area Support Group Signal Services Charlie Troop; 2 Area Support Group - Garrison Toronto.