Guam:
none
Guatemala:
990 km
note: 260 km navigable year round; additional 730 km navigable
during highwater season
Guernsey:
none
Guinea:
1,295 km (navigable by shallow-draft native craft)
Guinea-Bissau:
several rivers are accessible to coastal shipping
Guyana:
5,900 km (total length of navigable waterways)
note: Berbice, Demerara, and Essequibo rivers are navigable by
oceangoing vessels for 150 km, 100 km, and 80 km, respectively
Haiti:
NEGL; less than 100 km navigable
Heard Island and McDonald Islands:
none