Is it an american thing? Saying insincere things with no meaning? I say well played when I think my opponent has played well. I don´t praise bad play by lying an saying good game. But I am born and raised in Sweden where we usually say what we mean and mean what we say.
Nobody says "Good Game" anymore!

[I know this is a old forum]
LouStule, bro if you want to talk with people about chess and stuff then go outside then go to a chess club.
Or a tournament.
And it's peoples choice to say GG or not.
Sometimes I say GG If I'm In A Good Mood.
Anyways I'm Not Trying To Argue But Go To Chess Club.

#327 i said gg to an OTB opponent and he called the arbiter on me because he thought i was bragging 😭
Perhaps sometimes "thank you for the game" is a safer message. I am always grateful that someone is willing to play with me.
i agree with imh50 -- good game to a loser who has lost four in row is not very pleasant -- but thanking for a game is much better comment - than rubbing salt into wound by saying g.g - no matter what level you are at
@Snowchlobe, I wouldn't have taken it badly, and had I been the arbiter who was summoned, I'd have poured oil on troubled waters, and reassured your opponent that you intended it as a respectful piece of politeness to an opponent. Don't feel bad. I'm only offering the "thank you" approach as a low-risk alternative when you want to say something, and in case your opponent is super-touchy about things.
It is a problem (and a beauty) of chess that it is often played between people with wildly different cultures and backgrounds. This can bring people together, but it can also generate misunderstandings.
People have only said good game after I have blundered my queen or I have played badly, so they only use it to insult. This site is full of a holes, hence why I keep chat off.
#330 it was because i said gg before the game was over. i didn't know it was rude to do that.
You said GG before the game was finished and you didn't know you was being rude, you must be unbelievably ignorant or a liar.

When I played golf I several times witnessed situatoins when it almost came to physical violence when someone thoughtlessly said "good shot!" to a player who had just lost his ball...

I stopped saying "good game" in the past year or so for two reasons: the first is that I've muted chat entirely. A handful of folks who were unpleasant really tanked my desire to interact, and second is, as others have noted, it's far too easy to misconstrue it as insincere or mocking.
No one taught me to say good game after a chess game. I know it exist by looking at chess.com features. So I rarely remember to say good game after a game.