There is a fact sheet on the SW website about food optimising on a gluten-free diet.
To find it, go onto the website, log in, click on Searchable Features in the menu on the right hand side of the screen. Then click on the link to Health Features and Fact Sheets. Then click on the link which says Food Optimising with Allergies? Then scroll down for the piece on Coeliac Disease and THEN click on each of the two links for further information.
Sorry it is so long-winded, but perservere and you will find it!