I just installed google now launcher released today which is the nexus 5 launcher I have the GPE rom I highly recommend this makes your ultra much better remember it's for anyone with the GPE rom installed.
http://www.engadget.com/2014/02/26/google-brings-now-launcher-to-play-store/
https://play.google.com/store/apps/details?id=com.google.android.launcher
http://www.engadget.com/2014/02/26/google-brings-now-launcher-to-play-store/
https://play.google.com/store/apps/details?id=com.google.android.launcher