You pretend like it's not possible to use the current version without GCM/GSF installed, which is plain wrong.
It works very well, there is simply a message that tells the user he/she won't be able to use push messages without GCM.
You are basically telling people to trust that you didn't mess with it, instead of trusting Moxie (an accomplished security expert) and Open Whisper Systems.
If you want people to use this, you should release the source code, which you are already required to do by the GPL (https://www.gnu.org/licenses/gpl-faq...cePostedPublic
), add documentation how an identical build can be built and the hash of it.
It's also funny that your "pure SMS with no internet needed" version still requires full internet access in the permissions...