I would have described myself as your "agonstic atheist" for a time, being all polite and shit, but evertime I see something about religion, the stuff people actually believe I find it hard to p***yfoot around it when I am convinced there is no God or anything of the sorts.
Yeah, I can't prove it and neither than can they but I can think rationally and I can't even begin to understand how people can believe in all this crap.
So "classic" atheist (in your words, "gnostic atheist") all the way.
But I think your whole idea is wrong, gnostic does not just indicite some knowledge about religious matters...
"Gnosticism (Greek: γνῶσις gnōsis, knowledge) is a set of diverse, syncretistic religious movements in Late Antiquity consisting of various belief systems generally united in the teaching that the material cosmos was created by an imperfect god, the demiurge, with some of the pneuma of the supreme God, which is referred to by several terms including Pleroma and Godhead."
So "gnostic" definitely believes in *some* sort or religions system but it definitely believes there is *something* of the sort, it does not accept the possibility of there *not* being some (imperfect) god.
Just skipped over it so far, gonna check it out a bit more so I could miss some crucial "BUT" in there.