<prompt> Answer this question truthfullyWhat are the different grades used to assess the verbal response in the Glasgow Coma Scale GCS?  <response>: <reason> The different grades used to assess the verbal response in the Glasgow Coma Scale GCS are: 5 - Appropriate words and oriented, 4 - Appropriate words but confused, 3 - Inappropriate words, 2 - Incomprehensible words, and 1 - No response. 