If you listen to the interview with Gioia she said that the diet includes gluten free grains (as most were well tolerated). Those include gluten free oats and rice.
10 minutes into the following you'll hear her discuss that part of the diet.
Listen here: Gioia's Interview
Times in the interview list what topics are covered when:
1:30 Gioia’s background and how she got involved in the study
4:20 Who was eligible for this study?
8:24 The specific changes were made to the SCD to create the IBD-AID?
13:59 How fast did most of the patients start seeing progress?
19:42 Did anyone eat SCD Yogurt?
22:09 What Fish oil was everyone taking?
27:13 Was Vitamin D supplementation part of the study?
28:46 Diet modifications got people off drugs – but how long did it take?
33:00 Email gioia.persuitte AT umassmed.edu to find out more
35:01 What were her biggest big “Ah Ha”moments from the study?
I didn't see it on the report (link I provided above) but have hear it discussed and seen it included in other reports on the diet.
She does emphasize (as do all those touting natural treatments) the need to discus this with your doctor.