Here's the history if GR OS and we will show in a timeline by release date and its artictecture.
October 2015
GamerROM Online™ Gaming Service was released and Launched for everyone running Android v5.x.x
August 2015
GamerROM 8™ was released running Android v5.1.1 with CM SDK 1 and was ported to the S5 (Current OS)
July 2015
GamerROM 7™ Was released running android v5.1.1 but was removed of certain reasons with third party devs.
May 2015
GamerROM 6™ Was released with Android v5.1 but was removed vecause of issues
Febuary 2015
GamerROM 5™ was released running android v5.0.2 upfraded to v5.1.1 at a later date
January 2015
GamerROM Classic™ released for all S4's running Android: v4.4.4 Kitkat
December 2014
GamerROM 3™ was released for all Galaxy S4's running Android: v5.0 Lollipop, other devices for GR3 were releaseed with a different Version and release date.
October 2014
GamerROM 2™ was released for the Samsung GALAXY S4™ T-Mobile Variant running Android v4.2.2
August 2014
This month we released GamerROM 1™ For The GALAXY S4 T-Mobile Variant with Android 4.2.1