I love SeaGrape Beach and definitely try to make a stop there on each of my visits to GC. You can grab a beach shuttle at the pier for $3 pp and the ride takes about 10 minutes. I am guessing it is about 5 miles from the pier. It is not far past the new Ritz-Carlton on 7 Mile Beach. For $10 you can get a beach chair, umbrella and bottled water. They have changing rooms, a clean bathroom, a great bar and casual restaurant.