Online gaming pioneered the shorthand we use to communicate across the entire...

https://charlie-wiki.win/index.php/From_Gamertags_to_Digital_Identities:_How_Gaming_Normalized_Our_Online_Personas

Online gaming pioneered the shorthand we use to communicate across the entire internet today. When players needed to say something quickly during an intense match, they developed terms like GG to show respect and sportsmanship instantly