Gad (n.) : The point of a spear, or an arrowhead.
Gad (n.) : A pointed or wedge-shaped instrument of metal, as a steel wedge used in mining, etc.
Gad (n.) : A sharp-pointed rod; a goad.
Gad (n.) : A spike on a gauntlet; a gadling.
Gad (n.) : A wedge-shaped billet of iron or steel.
Gad (n.) : A rod or stick, as a fishing rod, a measuring rod, or a rod used to drive cattle with.
Gad (n.) : To walk about; to rove or go about, without purpose; hence, to run wild; to be uncontrolled.