King's College London GKT School of Medical Education (abbreviated: GKT) is the medical school of King's College London and one of the United Hospitals. It is the biggest healthcare training facility in Europe. The school has campuses at three institutions, Guy's Hospital (Southwark), King's College Hospital (Lambeth) and St Thomas' Hospital (Lambeth) in London. The school in its current guise was formed following a merger with the United Medical and Dental Schools of Guy's and St Thomas' Hospitals (GKT) on 1 August 1998.