Interjection. GG. (online gaming, slang) Good game; commonly used at the end of a gaming match; also sometimes used to end an argument. (slang) Good going; may be used genuinely or sarcastically.

Re: About gg and good game\n\n Yes, I agree that wishing for "good game" for both players is the appropriate response. The "you too" response usually comes out of politeness or habit, rather than a genuine response.