The GCCG was founded in 1968 and has been in continuous operation since 1973. We have more than 220 members worldwide, with our principal membership coming from the United States, Canada, Germany, and the United Kingdom.
Since 1973, the GCCG has regularly publlished its journal, Vorläufer, highlighting new research, discoveries, and educational articles. Vorläufer is an English-language publication, and is currently published twice a year.
It is one of two major study groups for the German Colonies, the other being the Arbeitsgemeinschaft der Sammler Deutscher Kolonialpostwertzeichen of the German Bund Deutscher Philatelisten (BDPh).