you need to copy id of the addon and paste in downloader,
for instance steamcommunity,com/sharedfiles/filedetails/?id=2929642463 these numbers are ID

Links
Nether Downloader github.com/NethercraftMC5608/NetherWorkshopDownloader/releases/

GWTool moddb.com/mods/garrys-mod/downloads/gwtool-file-made-by-zombieslayer103

If it doesnt work, you need to install Python: python.org/downloads/

Extra
7Zip 7-zip.org/download.html
Gmod Workshop steamcommunity.com/app/4000/workshop/
(in Browser) Web Workshop Downloader https://ggntw.com/steam


hashtags:
#gmod #steamworkshop #garrysmod #workshopdownloader #гмод #гарисмод #workshop #addon