duh.. senior moment lol, I meant GAC,, I'd never heard of them at disney before, how are they used.. Thankfully I can still transfer from my ECV to the rides etc, but you never know in the future.
They are meant to show the CM's when there is a invisible issue that a ECV or wheelchair doesn't cover. They allow for certain accommodations to be made to allow the guest to be able to enjoy the attraction.