The Official Online RBS 6 Nations Store is open. The store has everything you need to get behind your team during the RBS 6 Nations, plus the store is now fully stocked with a much wider range of rugby merchandise.
Burns, 27, was absent from the Dragons side that overcame Ospreys last weekend and has subsequently been told by club medics to take a three-month sabbatical from rugby.
Dragons rugby director Robert Beale said: "Lloyd has been advised to withdraw from rugby for at least three months in order to fully rehab his neck.
"We are obviously disappointed for Lloyd, particularly with the Six Nations coming up, but Lloyd's safety and welfare has to be paramount."
Gatland, who will now choose between Matthew Rees and Huw Bennett for the starting berth at hooker, will be hoping to replicate the 22-10 victory over the Irish in October that saw Wales progress to their first World Cup semi-final since 1987.