- Garden Warbler
- Giant Coot
- Giant Hummingbird
- Giant Kingfisher
- Golden-billed Saltator
- Golden-crowned Flycatcher
- Golden-faced Tyrannulet
- Golden-headed Quetzal
- Golden-olive Woodpecker
- Golden-spotted Ground Dove
- Golden-tailed Sapphire
- Golden Grosbeak
- Grass-green Tanager
- Grasshopper Buzzard
- Grassland Yellow Finch
- Great-tailed Grackle
- Great Egret
- Great Grebe
- Great Horned Owl
- Great Inca Finch
- Great Kiskadee
- Great Reed Warbler
- Great Thrush
- Greater Ani
- Greater Yellow Finch
- Greater Yellowlegs
- Green-backed Firecrown
- Green-tailed Trainbearer
- Green Bee-eater
- Green Sandpiper
- Greenish Yellow Finch
- Grey-and-gold Warbler
- Grey-and-white Tyrannulet
- Grey-bellied Comet
- Grey-breasted Flycatcher
- Grey-breasted Martin
- Grey-breasted Mountain Toucan
- Grey-breasted Sabrewing
- Grey-breasted Seedsnipe
- Grey-flanked Cinclodes
- Grey-headed Gull
- Grey-headed Kingfisher
- Grey-hooded Bush Tanager
- Grey-hooded Sierra Finch
- Grey-winged Inca Finch
- Grey Gull
- Grey Partridge
- Grey Wagtail
- Greyish Saltator
- Groove-billed Ani
- Guanay Cormorant