On my Nexus 5 I have a persistent search bar that appears on all screens, regardless of launcher. I cannot remember or find where and how I set this. I would like to set the same feature on my Nexus 7. Any ideas, anyone?
As per your comment that the persistent search bar is not available on GO launcher makes your initial "regardless of launcher" comment invalid.
It is highly likely that GO Ex does not have an option to show the persistent search bar, as observed in a forum post. You might want to revert to using Nova (which I personally use) or Apex.
UPDATE 2014-01-27 17:10 For Nova launcher, you can configure the persistent search bar here: