GR5 character is based on Reallusion's G5 Game Skeleton and Facial bone system and can be successfully used inside iClone and in the external 3D applications after export (for export You must have 3DXchange Pipeline and buy Export License for this character).
Character is fully compatible with iClone standard character motions and has facial animation support (including lips sync). GR5 Characters are fully compatible with Unity 3D -- in the external application character's skin deformation will looks exactly the same as You constructed inside iClone.

More detailed technical information and high resolution demo images can be found in forum's post "GR5 Characters" -- http://forum.reallusion.com/Topic161807-37-1.aspx