The Glasgow Coma Scale or GCS is used to assess the level of consciousness or LOC of a person who had experienced a traumatic brain injury. In this system, the level of consciousness of the person is being measured based on a criteria. The score ranges from 3 (deep coma) to 15 (normal functioning). Based on the given scenario above, the patient had a 15 GCS score, then this means that the person is functioning normally and can resume to his or her activities.