IMO, qt-wallet just reads the geth. If ether uses same version of geth, than probably it's compatible. But i'm no expert on this matter.
Covertress can you or your dev team, give some answers on this question.
The qt wallet reads the krypton version of geth, called gkr.
That's correct, thanks notsofast. The QT will read gkr the Krypton version of geth.
It can be used with geth if the source is modified and recompiled.