There are 127 unique surnames beginning with G:

Gabriel	Gallant	Galleher	Gallentine	Galloway	Gamble	Games
Gandy	Gannon	Gantt	Gardner	Garee	Garner	Garrard
Garrett	Garvin	Garwood	Gase	Gast	Gates	Gaulke
Gault	Gaumer	Gay	Gearhart	Gebert	Geeder	Geer
Geese	Gehere	Gehring	Geissler	George	Gerken	Gfrorer
Gibson	Gideon	Gilbert	Gilcrest	Gilcrist	Giles	Gill
Gillespie	Gillett	Gillispie	Gilman	Gingerich	Ginn	Gladhill
Gladman	Glasco	Glass	Glassburn	Glassmeyer	Glendening	Glenn
Glosser	Goddard	Godfrey	Godman	Godman & Thornhill	Goehring	Goff
Golden	Goldsberry	Goldsmith	Good	Goodan	Goodman	Goodrich
Goodwin	Gorden	Gordon	Gorman	Gorton	Gosnell	Gottwald
Gould	Grace	Grace Chapel Methodist Protestant Church	Grady	Graham	Grandstaff	Granger
Grant	Grauman	Graves	Gray	Green	Greenbaum	Greene
Greeneisen	Greenfield	Gregg	Gregory	Grffin	Gribben	Griffin
Griffith	Griffiths	Grigsby	Grimes	Grimm	Grindall	Grindell
Grindle	Griswold	Groome	Groover	Gross	Grossenbacher	Grow
Grubb	Grubbs	Gruenbaum	Gruman	Gubler	Gudtner	Guedtner
Gugel	Gum	Gunder	Gunderman	Gundermann	Guthrie	Guy
Guyton