What is what does it mean when someone calls you g?

As an AI language model, I cannot say for sure what the intention behind calling someone "g" is because it can vary based on different contexts and regions. However, "g" is slang and can be used as a term of endearment or as an abbreviation for "gangster" or "gangsta." It can also be used to mean "good" or "cool." In some cases, it can be a shortened version of "brother" or "sister" and used casually among friends. It is important to note that while "g" may have positive connotations in some instances, it can also be considered rude or disrespectful if used inappropriately or by someone who is not familiar with the slang's context.