GCAHGeneral Commission on Archives and History (United Methodist Church)
GCAHGentle Care Animal Hospital (Raleigh, NC)
GCAHGeneral Contractors Association of Hawaii (Honolulu, HI)
GCAHGabinete das Nações Unidas para a Coordenação dos Assuntos Humanitários (Portuguese: UN Office for the Coordination of Humanitarian Affairs)
GCAHGold Coast Animal Hospital (Chicago, IL)
GCAHGraduate Committee on the Arts and Humanities (University of Colorado at Boulder)
GCAHGroton City Animal Hospital (New York)
GCAHGreen Cove Animal Hospital (Green Cove Springs, FL)
GCAHGrant Cynnal Addysg a Hyfforddiant (Welsh: Education and Training Support Grant)
GCAHGreenburgh Citizens for Affordable Housing (New York)
GCAHGhana Center for Attitudinal Healing