I recently came across a great product called a toaster bag. Several companies make these bags but they basically allow you to keep your GF food uncontaminated while using an unfriendly toaster. They also work in Toaster Ovens and George Foreman style grills. Check out two brands I found below and leave a comment if you've tried this out.
ToastaBags by PlanIt Products - Toastabags run from $3.99 for 30 use to $5.99 for 100 use
ToastIt Bags by Celinal Foods - 1 ToastIt bag runs $6.95 or you can get 5 bags for $30.