I couldn't make it to work if I have secure screen lock enabled... Only on unsecured.
Edit: maybe it was designed that way...?
Sent from my Nexus 7 using Tapatalk
As is detailed in the OP, GravityBox is designed to be used with stock, vanilla AOSP ROMs, not OEM and custom ROMs. In other words, Google Play Edition and Nexus devices. All OEM ROMs (TouchWiz, Sense, Xperia, Moto, etc.), and custom ROMs (CyanogenMod, ParanoidAndroid, etc.) differ significantly in their code base from pure AOSP. And as most of these ROMs are closed source, and the developer does not have access to all the devices, it means that GravityBox is not designed for, or tested on, these devices and ROMs.
Even though the Moto devices look like stock Android, they are as much custom under-the-hood as TouchWiz or Sense. It's just that Motorola decided to implement a skin that resembles stock Android, rather than a custom skin like Samsung has done. But the changes to the core code mean that many of GravityBox's features will not work, and actually do cause some well-known bugs. The same goes for ParanoidAndroid, there are just too many changes to the core code for GB to be reliable.
If you choose to use GravityBox on a ROM it was never intended to be used with, then you do so at your own risk, and without any support. You should always have a good nandroid backup and be familiar with ADB and Fastboot. At any time, a ROM update or GravityBox update may cause any/all GravityBox features to break, and worst case, send your device into a bootloop. This is just an unfortunate reality of using a mod on a device it wasn't intended to be used on. Any user who wishes to improve or fix bugs on their unsupported ROM is more than welcome to download the source code for GravityBox (links to Git in the OP) and work on debugging and fixing the bugs on their own.