GFS 2 topics · 2 sources ScienceWeather(Global Forecast System) One of the operational forecast models run at NCEP. The GFS is run four times daily, with forecast output out to 384 hours.NOAA National Weather Service — National Weather Service Glossary Cite TechnologyDefenseGovernment Furnished Software. See Government Furnished Property. 119DoD Missile Defense Agency — MDA Glossary Cite