Addons not showing up?

The addons that I put in garry’s mod do not show up. I put them in the right folder. I have tried everything, from reinstalling the game, to downloading the addons again. It does not work with any addon. I overwrited something in settings a while ago. I thought it reinstalling it would help. Please help!

ok, instead of putting them in addons- Click into the addon folder (I.E GUN SWEP!) then you will see model, lua materials, etc, copy them to Steam/ Garrysmod/ Garrysmod and if your asked to replace/merge hit yes.