PocketMatrix

Are you talking about WAD files other than DOOM1.WAD? The answer is no. The rest are commercial.

There are user-made WADs (PWADs) but those require a commercial version of Doom to work.

I reccommend you search for Final Doom on EBay. You'll probably find it for a fairly low price. Final Doom contains all the commercial Dooms: Doom, Ultimate Doom, Doom II, Plutonia and TNT.

Thanks for the reply. Will final doom have WAD files that I can use on my e200/ppc2002?

AFAIK all WAD files will work in gfDoom. Any WAD's will run on any hardware provided the Doom port is OK. WADs only contain sounds, art and maps; there is no hardware-specific or even processor-specific code.