| | Gaspe Fisheries Experimental Station | (1) |
| | Gemological Institute of America | (1) |
| | Geological Society of London. Marine Studies Group. | (1) |
| | Geological Survey of Japan | (1) |
| | Geological Survey of Papua New Guinea | (2) |
| | Geomarex | (7) |
| | Geomarex; CGMP Minerals Exploration Company | (2) |
| | Georgia University | (1) |
| | Geothermic Exploration and Development Corporation | (1) |
| | GESAMP | (2) |
| | Gilbert and Ellice Islands. Department of Labour. | (1) |
| | Gilbert and Ellice Islands. Ministry of Natural Resources | (1) |
| | Gillet, Preston & Associates Inc. | (2) |
| | Glugor-Fisheries Research Institute | (1) |
| | G.M. Meredith and Associates | (1) |
| | G.M. Meredith Associates | (1) |
| | GMP Associates Incorporation | (1) |
| | Government of Guam | (1) |
| | Government of Guam Department of Fisheries | (1) |
| | Government of Kiribati | (5) |
| | Government of the United Kingdom | (1) |
| | Government of the United Kingdom. | (1) |
| | Government of Tuvalu | (2) |
| | Government of Vanuatu. Ministry of Agriculture, Forestry and Fisheries | (2) |
| | Great Barrier Reef Committee. | (1) |
| | Great Barrier Reef Marine Park Authority | (2) |
| | Great Barrier Reef Maritime | (1) |
| | Great Britain. Hydrographer of the Navy | (1) |
| | Great Britain. Secretary of State for the colonies. Technical Advisory Group | (1) |
| | Greenpeace | (2) |
| | Guam. Aquatic and Wildlife Resources Division | (3) |
| | Guam. Department of Agriculture. Aquatic Wildlife Resources Division. | (1) |
| | Guam. Department of Commerce | (2) |
| | Guam. Division of Aquatic and Wildlife Resources | (1) |
| | Gulf Investment Corporation Pty Ltd | (1) |