Go into settings, and the native resolution will be half of what it should be. Launch the game, make sure to select 'Launch Garry's Mod(32-bit)' or 'Launch Garry's Mod(64-bit)', as this issue does not seem to occur if you press 'Play Garry's Mod'. Steps to reproduceĮnable x86-64 - Chromium + 64-bit binaries beta.
My window is about twice as big as it should be which is annoying, and for some reason it thinks my native resolution is half what is really is.
When I run the base game with no betas that works fine, however when I enable the x86-64 - Chromium + 64-bit binaries beta branch it doesn't work. I usually play gmod in a bordered window in 1080p.