| While Disney may not ask to see a note i'd recommend bringing one if it makes you more comfortable but make sure if you do bring one that you have the doctor state something like "johnny is under my care and due to his _______ it would help if he had a quiet place away to wait as that can trigger his condition" try to be specific in what accommodations he/she might benefit from having. Knowing your child's triggers can help in avoiding certain things by planning ahead but for those times where you can't avoid something thats where the GAC comes in handy.
If he just puts "johnny has ______ please accommodate his condition" it doesn't give them what special assitance he needs to be able to tour comfortably.
The GAC again is not a front of the line pass but it does help in a lot of ways in making your wait as comfortable as possible. If there is fastpass available you maybe asked to take a fastpass and to return at the time printed on it.
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