1st - dont know why, but i was getting errors in camera app with the mod ( errors only in movie mode al other modes where working)
2nd - KonstaT GApps ( at least the ones who where posted the fist time, as i didnt cheched if they got a new version) should fail if u use ART runtime (u should even check KonstaT's posts around the second page or so explaining his GApps package fail with A.R.T. , but that u should have no problem finding some that should work - even pointing to paranoid android's gapps package and stating we cant even use the full package cause lack of /system space)
3rd - if u dont know what ART is/ dont care for a faster system ( even if it can make some older apps crash) u can just use KonstaT GApps.
btw, ART is a AOT (ahead of time) compiler for apps versus the JIT (just in time) interpreter
so we got to chose,
a fast compiled version ( should take more time to run the first time u run it but is faster on the next time you run it) or a slow interpreted version (as all of us are used to use)