- Galaxies, Etoiles, Physique, Instrumentation
- GATS Inc.
- Gauss Professor Akademie der Wissenschaften zu Göttingen
- GAW Global Station Zugspitze|Hohenpeissenberg
- Gembloux Agro-Bio Tech
- Gemini Observatory [Southern Operations Center]
- Geneva Observatory
- Géoazur
- GeoControl Systems, Inc.
- Geodetic and Geophysical Research Institute
- Geodetic Observatory Pecny
- Géographie de l'environnement
- Geography and Environmental Science [Cornwall]
- GeoHydrodynamics and Environment Research
- GéoHydrosystèmes COntinentaux
- Geological Survey of Canada - Office
- Geological Survey of Canada [Ottawa]
- Geological Survey of Japan
- Geomática, Teledetección y SIG Aplicados
- Geo-Ocean
- Geophysical Institute [Bergen]
- Geophysical Institute [Fairbanks]
- Geophysical Laboratory [Carnegie Institution]
- Géopôle du Pacifique Sud
- GeoRessources
- Georg-August-University = Georg-August-Universität Göttingen
- George Mason University [Fairfax]
- Georgetown University [Washington]
- Georgia Institute of Technology [Atlanta]
- Georgia Tech Lorraine [Metz]
- Géosciences Environnement Toulouse
- Géosciences Montpellier
- Géosciences Paris Saclay
- Géosciences Paris Sud
- Geospace Science and Technology Branch [Washington]
- Geowissenschaftliches Zentrum Göttingen
- German Aerospace Center
- German Federal Environmental Agency | Umweltbundesamt
- German Meteorological Service
- German Remote Sensing Data Center
- German Research Centre for Geosciences - Helmholtz-Centre Potsdam
- Gestion de l'Eau, Acteurs, Usages
- GFI Informatique
- GIPSA - Communication Information and Complex Systems
- Glaces et Continents, Climats et Isotopes Stables
- Global Carbon Project
- Global Change Unit
- Global Edge Institute
- Global Environment and Marine Department [Tokyo]
- Global Modeling and Assimilation Office
- Global Science and Technology, Inc.
- Global Systems Institute [Exeter]
- Globe Institute
- GLOphotonics S.A.S.
- GMV
- GMV Aerospace and Defence
- GNS Science
- Gobabeb Research and Training Centre
- Goddard Earth Sciences and Technology and Research
- Goddard Earth Sciences Technology and Research II Center
- Goethe-Universität Frankfurt am Main
- Goethe University Frankfurt
- Gordon State College
- Göteborgs Universitet = University of Gothenburg
- Graduate School of Advanced Science and Engineering [Higashi-Hiroshima]
- Graduate School of Environmental Science [Sapporo]
- Graduate School of Environmental Studies [Nagoya]
- Graduate School of Frontier Science [Chiba]
- Graduate School of Frontier Sciences [Kashiwa]
- Graduate School of Information Sciences [Sendai]
- Graduate School of Science and Engineering [Higashiosaka]
- Graduate School of Science [Chiba]
- Graduate School of Science [Kobe]
- Graduate School of Science [Sendai]
- Graduate School of Science [Tokyo]
- Graduate School of Science [Toyonaka]
- Graduate School of Science [Toyonaka, Osaka]
- Graduate School of Systems and Information Engineering [Tsukuba]
- Graduate School of the Natural Science and Technology [Kanazawa]
- Graduate University for Advanced Studies [Hayama]
- Grand Accélérateur National d'Ions Lourds
- Gran Sasso Science Institute
- Grantham Institute for Climate Change and the Environment
- Graz University of Technology [Graz]
- Grenada Meteorological Services
- Grenoble Alpes Recherche-Infrastructure de CAlcul intensif et de Données
- Grenoble Images Parole Signal Automatique
- Grinnell College
- Groupe Astrométrie et Planétologie
- Groupe COMAT
- Groupe de Météorologie de Grande Échelle et Climat
- Groupe de Météorologie Expérimentale et Instrumentale
- Groupe de physique des matériaux
- Groupe de Recherche en Astronomie et Astrophysique du Languedoc
- Groupe de Recherche Energétique, Plasmas et Hors Equilibre
- Groupe de recherches sur l'énergétique des milieux ionisés
- Groupe de spectrométrie moléculaire et atmosphérique
- Groupe d'Etude de la Matière Condensée
- Groupe d'Etude des Méthodes de l'Analyse Sociologique de la Sorbonne
- Groupe d'Etude sur les Géomatériaux et ENvironnements Anthropisés - UR 3795
- Groupement de Recherche en Géodésie Spatiale
- Groupe Scénarios et services climatiques, Ouranos
- Group on Earth Observations
- Grupo de Astronomia y Ciencias del Espacio
- Grupo de Meteorología de Santander
- GSFC Astrophysics Science Division
- GSFC Cryospheric Sciences Laboratory
- GSFC Earth Sciences Division
- GSFC Heliophysics Science Division
- GSFC Hydrological Sciences Laboratory
- GSFC Laboratory for Atmospheres
- GSFC Ocean Ecology Laborator
- GSFC Planetary Magnetospheres Laboratory
- GSFC Planetary Systems Laboratory
- GSFC Radiation Effects Facility
- GSFC Solar System Exploration Division
- GSM
- Guangdong-Hongkong-Macau Joint Laboratory of Collaborative Innovation for Environmental Quality
- Guangdong Provincial Academy of Environmental Sciences
- Guelph-Waterloo Physics Institute
- Guy's and St Thomas' Hospital [London]
- Gwangju Institute of Science and Technology