Gannet
Goul ? :)
gravel
gateau
Doing
gaininggallonsgambledgardensgarmentgetawaygatewaygathersgeneralgentilegesturegettingghastlygiraffegirlishglassesglimmerglistenglorifygolfinggoslingglowinggradinggrantedglaringgleefulgloatedgovernsgravitygreatlygrowinggravelygrantedgreetedgravinggriffingrimacegrizzlygrosslygroomedgroomergroovedgrufflygrumblegruntedguessedgunshotguzzledgushinggutting
Gondola is a type of boat. It begins with the letter g.
grebe
Gannet
GOD
glory
Goul ? :)
Gash
Growing is first one I thought of
Golgotha, gardenia
growing
Get gnu gun, guy!