We have an Aunt in a wheel chair, can we get to the gate as she gets off the plane?

You can call the airlines about her flight and tell them that. She needs help getting off the plane I'll so you can try to get a boarding pass to meet her when she gets off.

Agree

I don't believe you can get to the gate without a boarding pass. In my experience the airlines have always been helpful to people in wheel chairs. I would contact the airline ahead of time to confirm that they will help her on and off.