Girl Scouts is a multi-level organization that has councils all over the USA and on military bases overseas. It is headed by a national organization--Girl Scouts USA---which sets direction, develops programming, does research and otherwise handles high-level big picture items. GSUSA is headquartered in New York City and is staffed by paid professionals.
Under GSUSA are separately incorporated councils, which are local non-profits that own and operate Girl Scout camps or other properties and which recruit, train and support adult volunteers and girls. Councils also have paid professional staff. Most Girl Scout programming is led by volunteers who serve the object of the organization--the girls.