What does G stand for?

Gold

Symbol:"Au" Atomic Number:"79" Atomic Mass: 196.97amu. Gold is one of the transition elements. Gold is one of the Earth's precious metals. You will find the yellow colored metal used in jewelry, electronics, coins, satellites, and even medicines. Gold is very non-reactive and will not oxidize in air. 

Gallon

A volumetric measure equal to 4 quarts (231 cubic inches) used to measure fuel oil. One barrel equals 42 gallons. A US gallon (3.785 liters) is 20% smaller than an Imperial gallon (4.546 liters). (gal) Imperial gallon. A measure of volume. 1 gal = 4.54596 litre (US) A measure of volume. 1 US gallon = 3.785 litre

Gasoline

The organic compound derived from fractional distillation of petroleum. It is mostly used for automobiles as a fuel also known as Gasoline. It is available in different octane number in different countries. In India it is available in to 75 to 80 and in USA 90 to 110. Motor gasoline (finished). A volatile, flammable, liquid mixture of hydrocarbons, obtained from petroleum, and used as fuel for internal-combustion engines.

Generation

In particle physics, a generation (or family) is a division of the elementary particles. Between generations, particles differ by their (flavour) quantum number and mass, but their interactions are identical. There are three generations according to the Standard Model of particle physics. Each generation is divided into two types of leptons and two types of quarks.

Gender

Genetic

Having to do with genes and genetic information.

Giggle

Means the person is giggling or laughing. Similar to writing, "hehe."

Glycine

Glycine is an organic compound with the formula NH2CH2COOH. Having a hydrogen substituent as its side-chain, glycine is the smallest of the 20 amino acids commonly found in proteins, and indeed is the smallest possible. Its codons are GGU, GGC, GGA, GGG of the genetic code.

Ground

The electric neutral line having the same potential as the surrounding earth; the negative side of a direct current power system; the reference point for an electrical system. 1. An electrical term meaning to connect to the earth. 2. A conducting connection, whether intentional or accidental by which an electric circuit, or equipment, is connected to the earth or some conducting body that serves in place of the earth.