(Editor's Note: This story has been updated to remove Anteon from the list of companies included in GDMS. It is part of General Dynamics Information Technology.) Though General Dynamics Mission Systems was created a year and a half ago, the process required to fully integrate the company's many businesses continues, according to the unit's top executive. At the end of 2014 , General Dynamics merged the advanced information systems and C4 systems businesses into a single business in an...