Hi, as Petals has mentioned, there are plenty of threads on the forum re the GC. We are in Maudsland, just behind Pacific Pines, (not too far from Hope Island) and have 3 kids, 9, 8 and 6, and are really happy with this area. It depends if you want to be nearer the beach, or nearer to work. We are on the northern Gold Coast, so it's much closer to Stapylton, but further from the beaches! We are well serviced for good shops, schools and amenities such as libraries, doctors, train station etc, and the motorway is close for easy access to Brisbane and the beaches. Most of the theme parks are up this end, so if you were to buy an annual pass it's great for the kids.
TBH, you probably won't go far wrong whichever suburb you choose; it may be dependent on budget, rental availability, and your choice of proximity to work or the beach. PM me if you have any questions etc, and good luck with your move!
Jo