the.com/gee

means Gram — the metric unit of mass equal to one-thousandth of a kilogram, informally clipped to 'gee' in casual speech.

from Simply short for 'gram,' which English borrowed from French 'gramme,' itself from Late Latin 'gramma,' a small unit of weight, traced back to Greek 'gramma' meaning a small weight or a written letter/mark — the sense drifting from 'something scratched or marked' to 'a tiny measured amount.' The clipped 'gee' is just everyday shorthand, the kind that happens whenever a word gets used often enough to wear its edges off.