I originally email See's with my question about gluten, but got tired of waiting for their response. Her is the very informative, and very complete email response I received:
 
Thank you for visiting Sees.com.  In response to your request for information  about the presence of gluten in our candies, our Quality Assurance Manager has  advised that we have reformulated our products and eliminated wheat as a direct  ingredient in all of our candies packed in standard boxes.  Some of our  packaging for our Awesome Peanut  Brittle Candy Bars still lists flour (wheat) on the box however this is  no longer the case.  We also do not use rye, barley, oats or malt as ingredients  in our candies.  Therefore, none of our Custom Mix pieces contain gluten as a  direct ingredient and cross contact is no longer a possibility.  This would  include our Peanut Brittle, Krispys, St. Patrick's Day Potatoes and our recently  introduced Sugar Free products.
You may have noticed that we do have  some products which are manufactured for us.  Some of these items that do not  contain gluten are our Milk Chocolate Drops, Milk Chocolate and Dark Chocolate  Foil Novelties, Sugar Sticks and Sour Chews.  As we've noted, most of our  products are gluten free.
However, we do have a few items which our  Quality Assurance Department does not consider to be gluten free because of  their decorations or they are produced in a facility that processes gluten.   These are decorated Chocolate Butters (decoration), Springtime Truffles  (decoration), Egg Nog Truffles (decoration), all Climber Canes, Puppet Canes and  Candy Canes, and the 3 oz. Bordeaux, Chocolate Walnut, and Dark Raspberry Hearts  (decorations).  Also, all of our decorated Easter Eggs may contain gluten  because of their decorations.  The only decorated Easter Eggs that would not  contain gluten are our 9.5 oz. decorated Rocky Road Egg and our 13.5 oz.  decorated Chocolate Butter with Pecans Egg.
In addition to the  information above, we wish to advise that the distilled apple cider vinegar used  in our Butterscotch Lollypops and Little Pops is grain based.
I hope this  information is helpful.  Thank you for your interest in See's Candies and we  hope to have the opportunity to serve you soon.
  
 Denise Becerra
 See's Candies Customer Service
 I am greatly impressed by the knowledge both of the woman I spoke to and the person who sent me this email. It's so good to get correct information from informed representatives.
Thank you See's