From the GE FAQ's.
http://www.cbp.gov/global-entry/faqs
Do Global Entry benefits allow head-of-the-line privilege at U.S. airports where Global Entry kiosks are not available?
The head of the line privilege is only available at U.S. airports that have Global Entry kiosks. The head-of-the-line privilege is reserved for program members if the kiosks are out of service, if a member gets referred to a CBP officer, and at the exit points.