Run Fast From GPG Management
Pros
No pros. Do yourself a favor and find somewhere else to live.
Cons
If the issue that you're having as a tenant will cost them money or require them to do work, they will not do anything. Management, Super, landlord, all the way down to the receptionist are insanely rude and unresponsive. They treat you less than and don't care about you or your housing condition or your wellbeing; the epitome of slumlords.
Advice to the owners
Do your job & don't treat people like shit
Great building on UES
Pros
Great location; clean building
Cons
Very thin apt walls