Officially the highest GamerScore on Xbox - Imgur

Paid Service - Xbox One Achievements and Gamerscore

The Most Gamerscore in One Achievement

Achievement – Minecraft Wiki

RedmptionDenied's TrueAchievements Blog

Gamerscore Leaderboard_Console - Xbox Wire

Xbox Gamer Gets Over 250,000 Gamerscore in One Day

How is this even possible? : r/xbox

Ray broke 500,000 Gamerscore on his Twitch Stream : r/roosterteeth

Apparently 75% of Xbox owners play less than 150 hours a year. Looks like most people aren't getting their moneys worth out of gamepass : r/XboxSeriesS

Achievement – Minecraft Wiki