| Rank | Country | Maritime claims |
| Germany |  territorial sea: 12 nm exclusive economic zone: 200 nm continental shelf: 200 m depth or to the depth of exploitation |
| Ghana | territorial sea: 12 nm contiguous zone: 24 nm exclusive economic zone: 200 nm continental shelf: 200 nm |
| Gibraltar | territorial sea: 3 nm |
| Greece |  territorial sea: 12 nm continental shelf: 200 m depth or to the depth of exploitation |
| Greenland | territorial sea: 3 nm exclusive fishing zone: 200 nm or agreed boundaries or median line continental shelf: 200 nm or agreed boundaries or median line |
| Grenada | territorial sea: 12 nm exclusive economic zone: 200 nm |
| Guam | territorial sea: 12 nm exclusive economic zone: 200 nm |
| Guatemala |  territorial sea: 12 nm exclusive economic zone: 200 nm continental shelf: 200 m depth or to the depth of exploitation |
| Guernsey | territorial sea: 3 nm exclusive fishing zone: 12 nm |
| Guinea | territorial sea: 12 nm exclusive economic zone: 200 nm |
| Guinea-Bissau | territorial sea: 12 nm exclusive economic zone: 200 nm |
| Guyana | territorial sea: 12 nm exclusive economic zone: 200 nm continental shelf: 200 nm or to the outer edge of the continental margin |
| Haiti | territorial sea: 12 nm contiguous zone: 24 nm exclusive economic zone: 200 nm continental shelf: to depth of exploitation |