Not sure Wholefoods sells
malted grains. If they do that would be excellent.
To make beer you need either (malted) grains that are gluten free, in the mash, such as millet, buckwheat, quinoa, maize, oats, sorghum, rice, etc. or use a gluten free malt extract, such as sorghum or rice (malt) syrup, there are probably others now too.
Nope, none are cheap, but shop around for a decent price.
https://beerandbrewing.com/gluten-free-craft-malt/
http://www.brewingwithbriess.com/Malting101/Gluten_Free_Brewing.htm
From what you describe, your friend needs absolute gluten free foods and drinks, not gluten reduced.
It's very important to make sure the ingredients used are indeed 100% gluten free. That means produced in dedicated gluten free areas and processes.
Make sure they are not just 'gluten reduced' as those are allowed by the FDA to be labeled as 'gluten free' in the American market.
Using Clarity-Ferm or Brewer's Clarex will NOT produce gluten free beer, but merely a gluten reduced beer at best.