Automatically Running Console Commands

Very simply I am wondering if there is any way to run a console command as soon as Garry’s Mod starts up. That is, without having to bind it to something or manually type it every time you start a new game.

I’m asking because I have the MW2 Style Impact Effects and I really like them, but I find it tedious to have to type cl_new_impact_effects 1 every time I start up.

Is there some way to automate this so I can be lazier?

I think theres an autoexec.cfg in garrysmod/garrysmod/cfg you can use.
Edit: Yup. Just put your command in there and play.

Ah ha! Very cool. Thanks.