Citricos is wonderful, but I’m not sure if any of the GF restaurants are open for brunch/lunch besides 1900 Park Fare (characters) and GF cafe, which offers very nice selections for brunch/lunch. Also a lovely restaurant.
Your choices at GF for breakfast and lunch TS would be 1900 Park Fare or GF Cafe. GF Cafe is very good. Good food, lovely atmosphere and friendly staff. There are no characters!
Another vote for Grand Floridian Cafe. Or a short monorail ride away we also love The Wave at the Contemporary which has a small, but really good buffet. And if its a Sunday brunch at California Grill should not be missed.