The gmowv2andspawnmenus.zip file you have requested: Garry's Mod / Add-ons / Half-Life 2 GMOW V2 & Spawn Menu - 34.7mb is not available. Perhaps try browsing all files for the game Half-Life 2 and upload any files you want to share or are missing. This is the only information we could locate:
This Garry's Mod add-on pack contains many driveable real-licensed brand vehicles to add to your maps! It will also let you spawn the driveable cars through the spawn menu in any map.