STEP 1

- Click the "Library" tab at the top of the screen.

STEP 2

- Search for Garry's Mod on the left side in your Library of games.

STEP 3

- Right click the game and go down to 'Manage'.

STEP 4

- An extra tab should show up to the side, now navigate to 'Uninstall' and click it.

STEP 5

- Confirm your choice.

FINAL STEP

- Never come back