A gate pass can be issued but that doesn't mean one will. But honestly there are two other options. CLE isn't a very large airport so distances will be at a minimum. You could drop her off, park your car, bring any luggage she will have so that she can just sit inside the terminal until you get there, and then walk your mother to security where she'd then proceed on her own. Or you could also request wheelchair assistance to the gate. Depending on how your mother is she may not want the wheelchair going to the gate.

I'm well aware of Jewish Guilt myself but there needs to be some common sense limits on how far you go.