I want to know how I can make an RPG map? I wanted to learn that style of mapping and if I can do it with Gimp so that it can help me plan for certain campaigns I may have with Star Wars and StarCraft. I thought it would be cool if you guys could teach me.

It's true, I am only using Gimp at the moment and I don't have any (per se) tiles to use for furniture and other props. I don't know how to get them either.