GEOS-Chem, including developments, is distributed under the MIT "Expat" public license.

You may view a copy of the license agreement and list of GEOS-Chem developers by following the links below. These documents are also contained in the root folder of the GEOS-Chem source code (in v11-02 and later versions).

http://www.geos-chem.org/geos_licensing.html