Gwinnett County is like many other places; it has its bad areas and its good areas. At one time a number of years ago, it had the dubious distinction of being named the fastest growing county in the nation. I've lived in the general area for nearly 20 years (most of that in a nearby county). Just do your research before making a move.
I'm not trying for the nursing program until next year, but I can say that I like Gwinnett Tech as a school. I'm in my second semester and have had nothing but good experiences all around. Not counting the mile-long lines at the school bookstore on the first day of semester, of course.
The Life Sciences Building, which is where the nursing program classes are held, is brand new. If I'm not mistaken, this its first semester.