This render appeared on the net, looks very good to me...
The last Bimmerpost news on the M4 Gran Coupe said that there's no M4 Gran Coupe expected as of now:
http://f80.bimmerpost.com/forums/sho...d.php?t=942331
source:
http://designrm.wordpress.com/2014/0...m4-gran-coupe/