The facility, located on Europa Road in the British Overseas Territory of Gibraltar's South District, comprised three buildings.

[1][2][3] It was located on Europa Road in the British Overseas Territory of Gibraltar at the southern end of the Iberian Peninsula.

[6] During 1915 there was a continuous stream of Australian, British and New Zealander wounded who arrived in Gibraltar, via hospital ship, from Gallipoli.

The hospital had already been at capacity due to casualties from HMS Hunter (H35), a Royal Navy ship that had hit a mine while on patrol near Almería in May 1937.

[1] During World War II, casualties from the Malta area were treated at BMH Gibraltar while their ships were serviced at the Naval dockyard.

[1] Teams of British and Canadian engineers prepared the tunnels and St. Michael's Cave, and filled it with beds and medical equipment, even flush toilets and an operating theatre.

[12] The Baby Friendly Hospital Initiative was established by UNICEF and the World Health Organization (WHO) to increase breastfeeding rates.

[12] During its last full year of operation, 2007, the hospital received permission to fly the White Ensign for several months, instead of the traditional Union Flag.

An officer was appointed to supervise their welfare, and a food allowance of fruit, vegetables and nuts was included in the budget.

Any ill or injured monkey needing surgery or any other form of medical attention was taken to Royal Naval Hospital Gibraltar and received the same treatment as would an enlisted service man.