[iamgrumpy]

I would put on the note what your son/daughter's special need is and what would help them cope/see the world.

If waiting in lines is a trigger then by all means use the GAC to maybe have a Cast Member have you wait off to the side while one of your family memebers waits in line. If there is a fast pass system on the ride in question then they may have you use that but may require you to get a fast pass and return later in the day at the time on the fast pass.

I wouldn't think of this pass as a front of the line type thing this is in place to help those whose special need isn't visible and so they don't have to repeat the need over and over again.

For special needs like autism/adhd/aspergrers (sorry i'm not good at spelling) i can understand how difficult it can be for the child and would make sure on the note that you have the dr put on there any triggers they may have, and what would make it easier on them. Quiet place to wait? that sort of thing.