Green Zone Agencies (GZA) CBO is an independent non-partisan, non-profit, Community based Organization established in 2014, working towards empowering orphans and widows infected and affected by HIV AIDS. GZA’s mandate is to advocate and implement policies and programs that enable women and… read more young people to exercise choice, access to services and participate fully in activities that promote their health and well-being. GZA has its headquarters in Kisumu, along the Kisumu-Busia Highway before KEMRI/CDC.