I recall us, as a family, watching his show on TV in the 80s where Fr. Gruner always repeating the message of praying that "the Holy Father would consecrate Russia to the Immaculate Heart of Mary". He seemed to repeat this mantra at least a dozen times every episode - not that that's a bad thing.
Then something happened, I am not sure exactly what that was, but it seems a controversy arose because it became known that JP2 consecrated Russia - from that point on, Fr. Gruner's mantra went from "the Holy Father needs consecrate Russia" to "the pope did the consecration improperly" to "the Holy Father needs consecrate Russia together with all the bishops" to "the Holy Father needs consecrate Russia together with all the bishops of the world together all at the exact same time" - in effect, seemingly at least, making the act of consecration all but impossible to be performed properly.
I've not followed him for the last +20 years because of that - it could be that he found out the consecration was not properly done and also what was really necessary in order for it to be properly done, I don't know - but IMO, the whole thing seemed like - and still does to me - some kind of ploy to keep his Fatima organization alive. I also cannot help but wonder why one of the books he sells: "The Third Secret" was like as thick as a phone book - I mean, seems like the actual secret should only be a few paragraphs long.......a pamphlet should be able to tell the third secret and have a page or two for explanations - again, IMO.
Now I understand there is another book relatively new they put out called "The Fourth Secret of Fatima" - whether Fr. Gruner is associated with it or not I don't know, but for me as one who stopped paying a lot of attention to him a long time ago because every time you turned around there was some new development from Fatima, I cannot help but think that there is plenty of money involved and therefore plenty of money to be lost should his Fatima network dry up and IMO, these regular new developments are one way to keep the money machine alive - if in fact that is what he is actually doing.