Celiac is considered a disability under the American Disabilities act. With proper medical documentation she may qualify for support from the university disability office. They maybe able to assist with the problem of the meal plan and other accomdation she may need to stay healthy.
My son qualifies for other reasons other than celiac. I have found the disability office very helpful at the local community college. Also, he get priorty registration for classes.
Celiac is def covered by ADA..its likley that whom ever u are dealing with at the Univeristy has no idea about that..keep pressing until you get the right person and certainly have appropriate documentation from your daughters MD. I have a 25 year old daughter who was diagnosed while she was in college too. It is a bit of an adjustment when learning to live with a chronic disease---but after a while you will all be alot more relaxed!! In the beginning I think its best to rely on naturally gluten-free foods. Many of the specialty items are very expensive and have varying appeal to varying people--one persons favorite is anothers trash!! Best of luck and good health!!