Gad zooks (or gadzooks)

Game is afoot - The

Game is up - The

Game of two halves

Gee whiz

Generation X

Genius is one percent inspiration and 99 percent perspiration

Get a word in edgeways

Get down to brass tacks

Get off on the wrong foot

Get off your high horse

Get on my wick

Get one's dander up

Get over it

Get the pip

Get the sack

Get the upper hand

Get thee behind me Satan

Get underway

Get used to it

Get your dander up

Get your goat

Giddy aunt

Giddy goat

Gild the lily

Gilt off the gingerbread

Ginned up

Ginger

Ginger up

Give a man a fish and you will feed him for a day

Give a wide berth

Give no quarter

Give up the ghost

Glass ceiling

Gloom and doom

Go and boil your head

Go berserk

Go by the board

Go by the book

Go Dolally

Go-faster

Go for a burton

Go haywire

Go like the clappers

Go off half-cocked

Go out on a limb

Go postal

Go over like a lead balloon

Going to hell in a handbasket

Go pound sand

Go the whole hog

Go to pot

Go to the dogs

Go to the foot of our stairs

Go to the mattresses

Go whole hog

God is dead

God rot them

Godfrey Daniel

Going for a burton

Golden key can open any door - A

GOLF - Gentlemen only, ladies forbidden

Gone for a burton

Good as gold

Good in parts

Good man is hard to find - A

Good measure - For

Good men and true

Good riddance

Good Samaritan

Goody, goody gumdrops

Goody two-shoes

Gordon Bennett

Got my mojo working

Grace of God - There but for ...

(Take with a) grain of salt

Grand slam

Grandfather clock

Granny dumping

Grasp the nettle

Grass up

Graveyard shift

Greased lightning

Great minds think alike

Great unwashed - the

Green eyed monster

Gregory Peck

Gridlock

Grind to a halt

Grinning like a Cheshire cat

Grist to the mill

Gry - Words ending in

Guinea pig

Gung ho

Gussied-up

Guts for garters