Hi Candace,
Thanks for writing. Many guests (I'm one of them!) report that Walt Disney World is an incredibly "user-friendly" destination for folks with special dietary needs/concerns/restrictions. This holds true for all the restaurants at the World Showcase! When you make your advanced Dining Reservations, note your dietary concerns/needs with the cast member who assists you at 407-WDW-DINE, or on the online form. When you arrive at your table-service restaurant, the chef, or a designee will come out to speak to you to suggest options that will accommodate both your dietary needs and taste buds! You might also want to email
specialdiets@disneyworld.com to discuss any specific concerns.
The independent website allears.net has some additional information regarding gluten-free options at Walt Disney World. You can simply search "Gluten Free Dining" from their home page. At Counter Service Restaurants, you should let them know that you have a special diet when you arrive at the register, and a manager, chef or appropriate designee will review safe options for you.
As for drinking, every pavillion across the World Showcase has a lovely selection of adult beverages that range from beers, wine, champagne, margaritas, etc. I love La Cava in the Mexico Pavillion which features a huge selection of Tequila and some of the freshest margaritas I've ever tried! Have a great trip!