Global Update Threads are threads that contain everything a Clash Royale update could have : new cards, challenges, features, balance changes...
The first Global Update Thread ever was the Titanic Update, made by Pseudovalide, and it was followed by TheDankPrince's Project Atlas and many others.
List of known Global Update Threads
-The Titanic Update : The first GUT ever made, and the most popular aswell.
-Project Atlas : The second GUT ever made, by TheDankPrince. Received very positive feedback.
If you made a GUT...
...then add it here. I was only able to find 2 GUT's in the Top 100 of threads by replies, however I think that more exist. If you made one, add it before it's too late.