Has anyone dealt with the FIREPROOF Gypsum Wallboard from the National Gypsum Company? Here are the pics: Wallboard Pics
Websearch quickly finds http://www.mesothelioma.com/asbestos-exposure/companies/national-gypsum.htm
Determining whether your product is one of those listed as containing asbestos is the challenge. For now I would assume the answer is yes until a test has been done.