How do I install the mods I just downloaded?

[Hitman Reborn]

I recently have downloaded mods for Garry's Mod. How do I install them onto Garry's Mod?

[TCB]

I... I just... Come on, OP, I... But...

You haven't even told us what mods you downloaded...

[flutterpie]

If the file you downloaded contains a folder, open that up. If there is a file called info.txt, it probably goes into garrysmod/garrysmod/addons.

If the folder has no info.txt but things like folders named lua, models, and/or materials, you should probably paste those folders into your garrysmod/garrysmod folder.