The gm_canyon.rar file you have requested: Garry's Mod / Maps / Half-Life 2: Garry's Mod Canyon Map - 176.39kb 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 is quite a small map by CoLD-IcE. It is not very good for building but it is perfect for "Desert" comics. Good work.