Since you have asked regarding 12202/KCVL-LLT GR Express I have answered to that train. Regarding other GR trains I doesn't know whether SMB is there or not. On January 22, 2015 when I last travelled from LTT to CAN SMB was not there. Before that in December 21, 2014, when travelled from CAN to LTT, SMB was not there in my coach but some other coach was having SMB. Now what I came to know is that they have removed all SMB from this train and permanently augmented with an additional coach.