Yea, I was just being snarky, I do know the intent of the GCS...and as mentioned it's not necessarily how it's used now.
That said, it is true that I have problems remembering it, even with the picture technique in the video above - and it's apparently not just me:
"The GCS is not consistently remembered. To be accurately
and consistently applied, a clinical scale must be easy to use and
remember. The GCS is widely perceived as complicated14,19-25
and takes more than just a few seconds to evaluate. In one
study, only 15% of military physicians could correctly calculate
the GCS, despite all of them being familiar with the scale and
most having completed the advanced trauma life support
course.21A second report observed that less than half (48%) of
clinicians correctly scored the GCS in a written clinical scenario;
with neurosurgeons correct just 56% of the time"
from an editorial in annals of EM reproduced here, which does a very good job of laying out the problems, including its poor value in predicting outcome:
http://dallenfarmer.com/wp-content/uploads/2012/04/1-s2.0-S019606441100655X-main.pdf