Venus versus Virus isn't GL. It pretends to be so, but the ending implies that she winds up with the boy she had long-standing crush on. (Not canon, but still...)

I forgot about Tetragrammaton 'cause it's been forever since I read it. I doubt it'll ever be fully scanned, but if you live in the US you can probably get your hands on a copy one way or another, 'cause it's licensed. Sadly, I probably won't be able to read it.

But I didn't know about Epitaph or Aoishiro. The latter is completely scanned, so yay! Epitaph probably won't ever come off hiatus, though.