Gruner is a far right loon who was suspended from priestly activity.  I know that the Vatican didn't want anything to do with his form of crazy and blocked him and his band of nutty conspiracy theorists from attending at least one Marian celebration.  When Pope Francis did a Marian vigil thing in 2013, I believe that the Vatican police and Swiss Guard were instructed to keep the Fatima crazies (and probably other crazies as well) out of St. Peter's Square.  I assume that they will be doing the same thing when Pope Francis goes to Portugal in May.