At my school, there are about 200 applicants who take an entrance exam. After you pass the exam, there is a questionnare that you fill out which basically sums up your experiences with patient care and why you want to be a nurse. After that, about 35 people are accepted into the program. So no, at my school there wasn't a certain GPA; it was up to the school who they chose to accept.
I went into LPN school with NO patient care background (I had always worked in sales or customer service jobs), so I think the first semester was more difficult for me than other students who were CNA's or MA's. Learning the terminology, meds, etc can be overwhelming if it is all new to you!
Nursing school is tough, but you can get through it if you really dedicate yourself to learning and studying hard. Good luck:nuke: