Note that a motor response in any limb is acceptable. The scale is composed of three tests: eye, verbal and motor responses. The three values separately as well as their sum are considered. The lowest possible GCS (the sum) is 3 (deep coma or death), while the highest is 15 (fully awake person).

Answer this question: a patient in the deepest coma would be scored a on the glasgow coma scale? Let's give stream of consciousness first:
The important part for answering this question is: The lowest possible GCS (the sum) is 3 (deep coma or death), while the highest is 15 (fully awake person).
So, the final answer is 3.