maps go where?

i need help with maps 'cause i downloaded some maps like gm_avalanche and gm_RealPlane

when you download them they should be zipped so you just unzip them and if the maps are just a .bsp than place them in program files/steam/steamapps/yourusername/garrysmod/garrysmod/maps or if its a folder with the map name and multiple folders inside put that folder in program files/steam/steamapps/yourusername/garrysmod/garrysmod/addons