Gas Analysis Modeling System - Department of Energy (GFGA)
Gas and Aerosol Measurement Sensor - Climatology (CERES)
Generalized Algebraic Modeling System - A software
Girls Against More Skirt (SAUO)
Groupement pour l'Avancement des Methodes Spectroscopiques et Physio-Chimiques d'Analyse - Group for the Advancement of Spectroscopic Methods and Physicochemical Analysis - Information service or system (IID)
Group for the Advancement of Spectroscopic and Physiochemical Analysis Methods (BUAC)
Guide to Available Mathematical Software - Internet resource
Gams - Botanist in plant scientific name (HUH)