In answers and comments to What does it mean when a software is called open-source for US-release only? I found out that when NASA uses the term "open source" it does not mean open to everyone! Software can still have export restrictions beyond specified individuals or companies within the US, and still be called "open source" by NASA.
Both contain paragraph J:
J. Notwithstanding any provisions contained herein, Recipient is hereby put on notice that export of any goods or technical data from the United States may require some form of export license from the U.S. Government. Failure to obtain necessary export licenses may result in criminal liability under U.S. laws. Government Agency neither represents that a license shall not be required nor that, if required, it shall be issued. Nothing granted herein provides any such export license.
So far I haven't found a clear statement if GMAT is available to everyone, or if you need to go through their application and screening procedure before getting a copy of an executable, or a source-code version of GMAT.
Could someone help me find the answer to "How open is NASA's "open source" GMAT software?"