Garrysmod Gamemode help!

[[RG-O] jamiecross5]

Hi there,

I have been working on a Gamemode for the couple of months and then I got a error I can't fix,

I DeriveGamemode (Sandbox) and it works with only one prob for exsample:

I try to spawn a vehicle and it says unknown command "GM_Spawnvehicle" Or somphing like that when I try to spawn a car or...
Unknowen Command "GM_Giveswep" To spawn a gun and with all the other props and stuff,

If you can help please do,
Jamie.