Merriam-Webster's Collegiate Dictionary:
gif
gift
gift certificate
gift of gab
gift of tongues
gift wrap
gifted
giftedly
giftedness
giftee
giftware
gifu
gig
giga-
gigabit
gigabyte
gigaflop
gigahertz
gigantesque
gigantic
gigantically
gigantism
gigawatt
giggle
giggler
gigglingly
giggly
gigo
gigolo
gigot
gigue
gij?n
gila
gila cliff dwellings national monument
gila monster
gilbert
gilbert and ellice
gilbert islands
gilbertese
gilbertian
gilboa, mount
gild
gild the lily
gilder
gilead
gileadite
gilgamesh
gilgit
gill
gill arch
gill cleft
gill cover
gill net
gill raker
gill slit
gilled
giller
gillespie
gillette
gillie
gillingham
gillnet
gillnetter
gillyflower
gilman
gilmer
gilpin
gilroy
gilsonite
gilt
gilt-edge
gilt-edged
gimbal
gimbal ring
gimcrack
gimcrackery
gimel
gimlet
gimlet-eyed
gimmal
gimme
gimme cap
gimmick
gimmickry
gimmicky
gimp
gimpy
gin
gin mill
gin rummy
ginastera
ginger
ginger ale
ginger beer
ginger group
ginger nut
gingerbread
