We cannot provide any guarantee that the theme is compatible with the Americans with Disabilities Act (ADA / GCAP). The themes team at Out of the Sandbox, another theme developer for Shopify, have written an article describing some of the issues involved, which you may find informative.
You can check out the article by following this link
If you need help ensuring your store is compliant the best thing to do is hire an expert Shopify developer to assist you in making a full audit of your store and any changes necessary. Shopify has links to many experts you can get in touch with through this link