| Gillian's FunLand | Sea Isle City, New Jersey, United States | - | | - |
| Gillian's Wonderland Pier | Ocean 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 |
| | Golden City | Brooklyn, New York, United States | - | | - |
| | Golden Gate International Exposition | San Francisco, California, United States | - | | - |
| | Golden Sandy Beach | Huangdao, Qingdao, Shandong, China | - | - | - |
| | Gordon Gardens | Cleveland, Ohio, United States | - | | - |
| | Gordon State Park | Saint Marys, Ohio, United States | - | | - |
| Goseokjeong Land | Cheorwon, Gangwon-do, South Korea | SBNO | | 1 |