Contrary to what you might expect, The Olive Garden has some GF options.
Most of the options are Zone-diet meat-and-vegetables type fare, though they claim that they have GF penne now, too.
I am somewhat dubious about this new leaf that Olive Garden has turned over. First of all, comments about Olive Garden at the Gluten-Free Registry have been less than stellar.
If you go, impress upon the server, manager, chef, and anyone else who will listen that everything must be cooked in fresh water. Usually, they just toss vegetables in the pasta water to cook. That's more than enough cross-contamination to cause a major glutenization.