Info on new Disabled Assistance System:
MiceAge Disneyland Update - Park It

To summarize:
October 9, 2013 is the start of the new guest assistance program, which will replace GAC

Guests will go to Guest Services to get a card (with photo ID) and then go to kiosks elsewhere in the park to make ride reservations

Like a Fastpass return time, less 10 or 15 min, the reservations allow you to not wait in line, but you will not be able to get more than one at once. You can get other types of Fastpasses during this time though.

Wheel Chairs may in some instances not qualify in most parks as queues have been built ADA compliant.