[takrupp]

It depends on whether you are going through a recruiter or not. A recruiter can broach that topic a little more gently than speaking with your prospective employer. If that's not a possibility, leave the GPA off there and put a bullet with "medical leave: XXXX - XXXX". Your employer will ask, talk about it frankly at that time.

[MurkyPast]

Maybe I've just had bad luck, but in my experience recruiters have proved to be a layer of unwelcome misinformation.

[takrupp]

Depends on the recruiter and industry. Its pretty easy to figure out the jokers from the professionals (simply by asking "Who is the hiring manager?" will a lot of times show you who is who). No doubt the big firms are typically loaded with jokers.