Geometry.
Gannet
Goul ? :)
being
Doing
gravel
gaininggallonsgambledgardensgarmentgetawaygatewaygathersgeneralgentilegesturegettingghastlygiraffegirlishglassesglimmerglistenglorifygolfinggoslingglowinggradinggrantedglaringgleefulgloatedgovernsgravitygreatlygrowinggravelygrantedgreetedgravinggriffingrimacegrizzlygrosslygroomedgroomergroovedgrufflygrumblegruntedguessedgunshotguzzledgushinggutting
Gondola is a type of boat. It begins with the letter g.
Gannet
grebe
GOD
glory
Goul ? :)
Gash
Growing is first one I thought of
Golgotha, gardenia
growing
its king!