Ok, from what I can tell, the Chocolate Castle is only available at GF, either their restaurants or if you are staying at the hotel. No other restaurants on property have it.
As for the chocolate strawberries, i THINK (not positive) that you can get those delivered to your room, if you are staying at a Moderate or delux resort. You just need to call the cake hotline ( 407-827-2253 ) and listen to the prompts for your hotel, and go from there. If you want it at a restaurant, I would call that restaurant directly.
Again, I'm not 100% positive on this as I haven't tried to get the strawberries yet, but from reading the cake thread, that is what people have said to do.