I type "gg" only sometimes...other times, I'll type "Oh crap" or "oops" or something like that if I really make a bad move, or otherwise overlooked his threat.
But if I play a patzer like myself and happen to win a lot of material forcing him to resign, I won't say anything because I have that feeling, like the forum had already pointed out, that I could be antagonizing him.
Then there's those times when I'll have a convo with my opponent about the game, and then recalling similar mistakes/moves in other games. That in my opinion is the best time for "gg," because you know that he's somewhat civil and won't tear off your head and chet down your neck just for trying to be nice.
Oh man , there is no love nor sportsmanship in 'gg'. It is the classic diplomatic insult coming from people that want to say either ' you got your butt kicked ' or ' obviously you used an engine' but don't have the guts to say it.
They love it when you respond with stuff like 'thanks'
I normally go for:You are a sore losing sack of &&%$$ when I win and : Oh please ,coming from a &&^%muffin piece of *&&^%$ball like you ! Why don't you go *&^%$ or (**&^%$$## yourself ,)(*&^%%$head.
gg is not an insult only if it is said in sarcastic tone...
The irony...