| Gent Universal Exposition | Ghent, East Flanders, Flemish Region, Belgium | - | | - |
| Ghost Town on the River | Louisville, Kentucky, United States | - | | - |
| Ghost Town Village | Maggie Valley, North Carolina, United States | SBNO | | 2 |
| Giant Fun Abha | Abha, 'Asir, Saudi Arabia | - | - | - |
| Giant Fun Al Khobar | Al Khobar, Eastern Province, Saudi Arabia | - | - | - |
| Giant Fun Jeddah | Jeddah, Makkah, Saudi Arabia | - | - | - |
| Gifu Chubu Mirai Expo | Gifu, Gifu, Japan | - | | - |
| Gillian's FunLand | Sea Isle City, New Jersey, United States | - | | - |
| Girabilandia | Giugliano in Campania, Campania, Italy | - | - | - |
| Girne Lunapark | Karsiyaka, Izmir, İzmir, Turkey | - | ≤ | - |
| Gladness Island of Oriental Sundown | Huangyan, Taizhou, Zhejiang, China | - | ≤ | - |
| Glasgow Empire Exhibition | Glasgow, Glasgow, Scotland, United Kingdom | - | | - |
| Glasgow Garden Festival | Glasgow, Glasgow, Scotland, United Kingdom | - | - | - |
| Glendale Park | Nashville, Tennessee, United States | - | | - |
| Glen Echo Park | Glen Echo, Maryland, United States | Operating | | - |
| Glen Haven Park | Rochester, New York, United States | - | | - |
| Glen Island Park | New Rochelle, New York, United States | - | - | - |
| Glen Park | Williamsville, New York, United States | - | - | - |
| Glico's | Manila, Metro Manila, Philippines | - | - | - |
| Glico's Great Adventure | Makati, Metro Manila, Philippines | - | | - |
| Glücks Königreich | Obihiro, Tokachi, Hokkaido, Japan | SBNO | | 1 |
| Go Bananas | Norridge, Illinois, United States | - | ≤ | - |
| Go Bonkers Now | Arlington Heights, Illinois, United States | - | | - |
| Godsheep Amusement Park | Shenyang, Liaoning, China | SBNO | ≤ | 1 |