Property values are lower over there because the area, especially Meadow Street, is right up on Hempstead. You can get a house for less money, but crime is higher. Also, people a big concern over there is the future of the Nassau Hub/Lighthouse Project, since the coliseum area is REALLY close to there. It's GC schools and people keep their homes nice, etc but the park over there (Grove) is gross and you get a lot of infiltration from the neighboring towns.
You can get much better value in the western section but houses don't come up for sale very often there.
No matter where you live in GC there will be tons of kids, you can be sure of that