It is managed under the Philippines-based hospital network, The Medical City.

It serves the US territory of Guam as well as neighboring Micronesia, the Northern Marianas, Palau and the Marshall Islands.

[2] The GRMC opened in July 2015, becoming the first private hospital in Guam.

[2] It is also reportedly the first Philippine-owned hospital on United States territory.

[3] In 2019, TMC opened a referral office to cater to patients seeking medical treatment outside Guam.