I play a lot of my golf these days at Sandridge GC in Vero Beach, which has two Garl courses - the Dunes and the Lakes. Both courses have their moments, but ultimately fall short of what could have been achieved. Each 18 has a hole with an island green. The main issue is that neither course takes enough advantage of the property's namesake feature. The Dunes course does the better job of it, with much of the back nine routed through the sand, while the Lakes has only three holes - 7,8,9 - in that environment. Then, the holes in the flat are largely pedestrian, with the well-named Lakes course overly hemmed in by water hazards.
All that said, it's a county facility that is very well-run and the courses are always in very good shape and relatively inexpensive to play.
Another Garl course I've played is Tradition GC in Litchfield Beach, SC, south of Myrtle Beach. I've always been underwhelmed with it, too, though it is always in very nice shape. Just lots of clumsy mounding, bunkering, and not very memorable greens. Two island greens, though!!!
The "best" of the Garls I've played is Brays Island, toward Beaufort, SC, though I wonder how much my enjoyment of it had to do with the extremely interesting setting it's in: the center of a very quiet, high-end community where equestrian, hunting and fishing seem to be the main concerns. The property is 3,000-plus acres, with only about 300 residences, so there's a ton of open space, including around the golf holes. The course itself has a bit of mounding and some odd features, but rolls along quite nicely and not overly unnaturally until the 13th, which is yet another Garl island green hole that totally disrupts the narrative of the course. You arrive in this massive open meadow, and there's this horribly unnatural holes marring the landscape. The last five holes play out much as the first dozen do, but the juju is gone. Still, Brays is well worth seeing/playing/experiencing, I'd say.