The Green-Fronted Hummingbird is a species of hummingbird found in Mexico and Western Guatemala.
The Green-Crowned Woodnymph is a hummingbird found in humid forest and tall second growth from eastern Panama, south through western Colombia (incl. Cauca Valley) and Ecuador, to far north-western Peru.
The Great-Billed Hermit is a large hummingbird with an extremely long and curved bill. This species of hummingbird is found in Bolivia, Brazil, Colombia, Ecuador, French Guiana, Peru, Suriname, and Venezuela.
The Grey-Tailed Mountain-Gem or Gray-Tailed Mountain-Gem is a hummingbird species that breeds only in the mountains of southern Costa Rica.
The Gray-Chinned Hermit is a South American hummingbird species found in Colombia, Ecuador, Peru, Venezuela, and - marginally - far northern Brazil.
The Gray-Bellied Comet or Grey-Bellied Comet is a large hummingbird found only in a few small areas of Peru.
The Gorgeted Sunangel is a medium-sized hummingbird found on the west slope of Ecuador and extreme southwestern Colombia.
The Gorgeted Puffleg is a is a critically endangered hummingbird found in the Andes of southwestern Colombia.
The Golden Starfrontlet or Golden-Tailed Starfrontlet, often considered a subspecies of the Golden-Bellied Starfrontlet is fairly common but local in wet mossy montane forest and forest borders in the Venezuelan Andes.
The Glow-Throated Hummingbird is a small hummingbird native native to the Talamancan montane forests of western Panama and generally is found along edge habitats.
The Fire-Throated Metaltail or the Fiery-Throated Metaltail is a small hummingbird found only in Peru.