No, PreciseSubmitter isn't a clone of G.A.S.S. as I wrote G.A.S.S. Version 2 will offer things not found in the first version that the FREE ones do not offer.
G.A.S.S. also works on XP, win98, win2k, winME and had someone using win95, tho I don't recommend it. The only big requirement is IE 5.5 or better. And it doesn't alter your system files.
G.A.S.S. isn't free but it's damn cheap. I've been asked why I don't charge 2x as much, but you know, it's all in what you think the market will bear.
G.A.S.S. has saved me an enourmous amount of time in tgp submitting, as well as my userbase. Version 2 will cut even more time off the submitting process, but it won't autosubmit now or ever.
Thanks to linkyd for buying G.A.S.S. tho