The mission of the project is to provide free, reliable, English-language information on Anabaptist-related topics.

[2] Starting as a database of Anabaptist groups in Canada, GAMEO secured rights to copy and update the Mennonite Encyclopedia published by Herald Press in the 1950s and 1990.

A project goal was to have the entire contents of the Mennonite Encyclopedia, including the supplement volume published in 1990, available on the web.

[3][4] Articles are either adapted from other scholarly works or assigned to knowledgeable authors and then undergo editorial review before publication to the website.

[2] Sam Steiner of Waterloo, Ontario, served as managing editor from the encyclopedia's inception until 2012.