Even with the official download, you may encounter errors. Here are fixes for the 2023.01 branch.

By following these steps, you should be able to successfully download and install Garry's Mod 2023.01 on your Windows computer. Enjoy!

Cause: Missing Counter-Strike: Source textures.
Fix: Either purchase CS:S, or download a texture pack from the Steam Workshop (search "CS:S Textures for GMod 2023").

Ensure your computer meets the minimum system requirements for Garry's Mod:

Published: October 2023
Target OS: Windows 10 / 11 (64-bit)
Version Focus: Garry's Mod Build 2023.01

Many 2023.01 maps will appear with purple and black checkerboards ("ERROR" signs) without CSS textures.

Step 1: Install Steam If you do not have Steam installed:

Step 2: Purchase or Locate Garry’s Mod

Step 3: Initiate the Download (Version 2023.01)

Step 4: Download and Verify