Guardians Of Doctrine (G.O.D.) sounds like another effort to become more like the Catholics, in this case theCongregation for the Doctrine of the Faith of the Roman Curia, today called the Supreme Sacred Congregation of the Holy Office which in previous centuries was better known as the "Inquisition".
James Penton makes a pretty compelling case in Apocalypse Delayed that the Witnesses have much more in common with Catholicism than they do with Protestatism, despite their history of launching hysterical attacks against the Catholic Church.
Despite the obvious similarities, I had never put two and two together until I read his book many years ago.