What yourrage viewers say when they see an attractive women (or male).

the thing that you don’t have when you’re phones percentage is over 20

Gyatt is basically saying "God" but like "Oh my God" or " God D*mn".
Just like those examples, it is used to indicate that something is considered surprising, shocking, thrilling, etc.

This word is used by the W or L twitch community to express their enthusiasm when they see a big butt.

To be surprised or caught off guard by what you find amazing