I've always assumed the only people who go to GH are those who have no choice or have family working here. Given the choice between any other hospital in Port Charles and General Hospital, I'd chose the other hospital.
Just off the top of my head:
1) bad doors - people are always getting stuck on the roof (why do they not have a door bell on that door)
2) HIPAA - the doctors and nurses have never heard of it
3) the serial killer
4) doctors treating people outside of their specialty
5) all the faulty lab results