What is symbol for gauge?

The symbol for gauge is typically represented as "g" or "G". It is a unit of measurement used to determine the thickness or size of a wire, sheet metal, or any other material. Gauge is commonly used in the manufacturing and construction industry. The larger the gauge number, the thinner or smaller the material is, while a lower gauge number indicates a thicker or larger material. The gauge system is based on the American Wire Gauge (AWG) system, which was developed in the 19th century.