Nobody should be influenced by Father Gruner. Before he died all his priestly faculties were suspended. He was NOT in good standing with the Church.
The Vatican Congregation for the Clergy has published a reminder that Father Nicholas Gruner, the self-styled leader of the International Fatima Rosary Crusade, has been suspended from priestly ministry and does not have ecclesiastical approval of his activities:
"In 1996 the renegade cleric was suspended from his priestly functions by the Bishop of Avellino, Italy-- the diocese in which he had been ordained. Although he appealed the suspension, the appeal was unsuccessful. The Congregation for the Clergy, in its September 12 message, recalls that Father Gruner’s suspension was “confirmed by a definitive sentence of the supreme tribunal of the Apostolic Signatura.”