New union bumperstickers Bumper stickers are now available by phoning GCC/IBT headquarters at (202) 462-1400 or emailing: webmessenger@gciu.org. [back to top] Copyright ©1997-2006 GCC/IBT, 1900 L St., N.W., Washington, D.C. 20036. Phone: (202) 462-1400. Fax: (202) 721-0600. Comments? Contact the webmessenger.