CGO 2003 – San Francisco, California (March 2003)
CGO 2004 – Palo Alto, California (March 2004)
CGO 2005 – San Jose, California (March 2005)
CGO 2006 – New York, New York (March 2006)
CGO 2007 – San Jose, California (March 2007)
CGO 2008 – Boston, Massachusetts (April 2008)
CGO 2009 – Seattle, Washington (March 2009)
CGO 2010 – Toronto, Ontario (April 2010)
CGO 2011 – Chamonix, France (April 2011)