[2] The Trust is funded through fees from exhibitions, a portion of ticket sales for access to listed properties managed by the Gibraltar Tourist Board and from donations.

[3] Although the Gibraltar Museum is owned and operated by the government, the Trust has an advisory role and assists in expanding the collection.

[4] The Trust maintains a list of historically important buildings and structures, and gives advice on their preservation and restoration.

With Gibraltar's long history as a garrison town and naval base, most of the listed structures are military, including defensive walls, bastions and batteries.

[6] In the late 1990s the trust arranged for the restoration of Parson's Lodge Battery, which in 1884 had three 10 inches (250 mm) muzzled loading rifled guns.