If someone with special needs wants to rush, more power to them!
In certain situations, such as severe autism, a social GLO may not be a good fit. That doesn't mean the individual shouldn't try, just that things may not work out.
In many cases, it's not so much a question of having a disability, but rather a question of what your attitude is towards your disability. Say you're blind, for example. Do you let that hold you back, or do you grab your seeing-eye dog and go and do? Your blindness may mean you can't drive a car, but it doesn't mean you can't join a GLO or go to college or hold a job or raise a family.
We had a PNM come through one year who was temporarily confined to a wheelchair. She wasn't about to let that hold her back, though. Panhel made arrangements for her mother to accompany her, so that she didn't have to worry about steering a wheelchair herself, and rush is held in the student center, which is wheelchair-friendly. All went well, and she ended up going AEPhi.
(edited because I can't spell

)