KANSAS CITY, Mo. & CHICAGO & NEW YORK--(BUSINESS WIRE)--GridLiance GP, LLC (“GridLiance” or “the Company”) and Blackstone Energy Partners, an affiliate of The Blackstone Group L.P. (NYSE:BX), today announced the formation of GridLiance, the nation’s first competitive transmission company focused on collaborating with under-served U.S. municipal, cooperative and joint action agency utilities (“Public Power”) to jointly plan, develop, own and operate transmission infrastructure. These new project