[5] GBMC maintains a collaborative care agreement with Sheppard Pratt, a mental health services facility and system with which it shares adjacency on the Towson campus.

The Presbyterian Eye, Ear and Throat Charity Hospital originated as a clinic in the Civil War surgeon's East Baltimore carriage house in 1887.

In 2020, GBMC was granted the Malcolm Baldridge National Quality Award as well as a 5-star rating from the Centers for Medicare and Medicaid Services.

[8] GBMC underwent a major renovation and revitalization construction project starting in 2021 that included 60 new inpatient beds and a new cancer institute.

Services include medical, nursing, social work, home health aid, spiritual and bereavement counseling/support, and volunteer assistance.

[11] In 2007, GBMC and Johns Hopkins Medicine began a strategic clinical affiliation for several programs, beginning with cardiology, pediatric surgery, and oncology.