change default startup settings and commands?

I am hoping someone can please help me figure out how to configure Gmod to maintain certain commands and settings when loading Gmod in single player, and when changing maps.

These are the commands and settings I would like to be constant:

sv_cheats 1
notarget
host_framerate 0

View Draw Distance LOD Model 0
screen shot quality 100%

Thanks for any help you can offer, if any of this is even possible to set as static.