Having been on GCI more than 15 times, I was familiar with the location of the condo...and the Tibbets Highway made it an easy drive from the airport. Condo is 20 ft, from the pool, and about 50 yds from the ironshore (no beach, just in case you didn't know) and the entry/exit points to the sea. The aluminum ladder is fairly heavy...I'd recommend you have another to get it installed if you want to dive or snorkel off the condo. The wall sites are witin easy reach...about 150 yds, and Bonnies Arch is closer (and shallower...about 75 yds just to the NW...moorings are all easy to see. We had a windy five days, so couldn't get in/out there, but got some good diving and snorkeling in up around the Cracked Conch (great food/service/atmosphere right on the water, by the turtle farm, and also dove the North Wall (Babylon) one day on our round the island tour. My wife did the dolphin encounter thing (also right by the turtle farm)....she loved it, so I was happy! Be aware that if you want to dive, there are only a few operations that willl let you rent tanks and weights and take them offsite, and none of the onsite shops will allow solo diving...you'll have to find a buddy or pay a guide. Or you can just go somewhere there is no on-site facility, jump in with a rented tank...and have your own private ocean...which I did.
Condo is set up great for four people, kitchen is well appointed for cooking ('frig has a nice icemaker).
All in all it was a great stay.
I also highly recommend you DO NOT arrive after noon on a Saturday....LOTS of arriving flights, and the customs/immigration people, as well as the rental car companies get overwhelmed.....and slow!
Mike, the owner, was very helpful with answering any questions I had in the rental process.