Property in mother's name gifted to son through deed can we object?

My father expired in 2002 leaving behind Mother and 5 sons (2 sons from 1st Mother). He has acquired properties in his name and some in name of mother and joint name of mother and bother. 1 shop has been transmitted to mother being nominee in society records, now she and brother 4 has created third party right without consent of other legal heirs. Also the properties in name of mother has been transferred to brother through Gift Deed. Can the matter be taken to co-operative court as I cannot afford Court fees