Map Making???

I know this is a pretty n00bish question but i have never actually made a map mod before and i was wondering what the easiest program to make a bsp in is??

Hammer is (as far as I know), the only Garry’s Mod compatible map creating program, correct me if I’m wrong.

The only way to make a Source map is through the use of the Hammer World Editor, found in the Source SDK which you can download under your Tools tab.

cool ill get that
thanks