Are you planning on visiting a park that day or is it simply to enjoy the resort? As it's only one day, I'd decide on which benefits you the most. If you plan on visiting MK, I'd go with the GF as to not use up any valuable time on transportation. If visiting AK is in your plans, go with AKL. If parks don't come into play, I'd choose based on which themeing you prefer.
Personally, I need to see the castle when I'm at Disney. I tried to stay away from the MK resorts and it just didn't feel right to me. I like being more centrally located. Even if we aren't doing any parks, I can still take the monorail or the resort boat around and be within distance of 2-3 other resorts. I've not had the same GF experience as Webray and we return to their concierge level quite often. I've also heard wonderful things about the AKL cl though and if you're looking for some get-away time before the cruise, that's an excellent choice.
Good luck with your decision.
Tammi