The Gigajoule is a a number of of the joule, that's the SI derived unit for Power. While in the metric system, "giga" is the prefix for billions, or 109. Gigajoules may be abbreviated as GJ XJ-thirteen, also referred to as "XJ13" and "XK Thirteen," is often a hybrid marijuana https://rto.zpia.in/gujarat/surendranagar-gj13