gravity or the acceleration of gravity;
specific gravity;
a unit of acceleration equal to the acceleration of gravity: used to measure the force on a body undergoing acceleration, expressed as a multiple of the body's weight (a.k.a the g-force);
electrical conductance;
general intelligence;
a grade meaning good;
slang for one thousand dollars;
giga;
the 5th tone or note in the ascending scale of C major;
general audience: a motion picture rating indicating that the production is suitable for persons of all ages;
guanine - one of the four nucleotides used in building DNA;
the first letter in the words Georgia and genius;
glucose - a sugar, C6H12O6, having several different forms;
the seventh letter of the Greek and English alphabets;
a symbol for the 7th in a sequence or group;
the seventh vertical row of squares from the left on a chessboard