A post graduate is a graduate that graduates again. This is also to say a person who continues studies after graduation, usually beyond a bachelor's degree.
Under graduate means you have yet to graduate, post graduate means you have graduated. A post graduate course is for those students that have graduated. The under graduate studies are laying the foundations for further learning. You cannot put the roof on before you have built the walls.
Graduate Institute for Entrepreneurial Studies was created in 2006.
Graduate Institute of Development Studies was created in 1961.
Berea University of Graduate Studies was created in 1997.
University of Texas at Austin Graduate Studies was created in 1910.
Berlin Graduate School for Transnational Studies was created in 2008.
Graduate School of North American Studies was created in 2006.
National Graduate Institute for Policy Studies was created in 1997.
Kyoto College of Graduate Studies for Informatics was created in 2004.
The motto of Won Institute of Graduate Studies is 'Professional Development. Professional Achievement.'.
Central Philippine University School of Graduate Studies was created in 1951.