[help] installing cars and vehicles

hey guys anyone knows how can i install vehicles / models / weapons
to My server

Find a workshop addon/legacy addon > extract or use the .gma/use the files > upload to server: garrysmod/addons > restart

when i subscribe to an addon i want to access it from Gmod file so i subscribed to a helicopter thread but i cant find it on the addons folder

Load up your Garrymod and let the addon mount first. Then check for the addon under garrysmod/addons