That's interesting. I've only managed to locate and visit Grace Communion International congregations. I can't find any active WWCG splinter groups locally. I was told by a Grace Communion International member that there were a few adherents of a splinter group called "United Church of God" in Scotland but they didn't last long and have no active congregations in Scotland. Maybe one in Newcastle, I was told.
This is something I have found: just because a group has a presence on the Internet, doesn't necessarily mean they have a functioning church in the real world. I think some of the WWCG splinter groups faded away pretty quickly and exist in name only. (On that, I suspect that the "Lord's Witnesses" may be as real as Gordon Ritchie's chronology. Has anyone ever been to any of their meetings to verify they exist?)
The church headed by Jospeh Tkach (pronounced t-catch) is by far the biggest, although it has shrunk a lot. By the way I heard from an insider that Tkach is retiring next year. I wonder how that will work and if it will survive without him.
Interesting thoughts there.
The GCI Wikipedia page has some interesting points that could in time end up applying to the Org.
In general, Tkach Sr. directed the church theology towards mainstream evangelical Christian belief mostly against the wishes of his congregations and they were given no input as he had maintained the same structure as Mr Armstrong. This caused much disillusionment among the membership and another rise of splinter groups. All these changes, the church admits, have organizationally brought about "catastrophic results," though they believe that it is spiritually the best thing that ever happened to them.
Though many of the current members, however still follow his basic beliefs and would consider the current administration as apostate despite still attending.
Today, the GCI headquarters has downsized for financial survival. The denomination sold much of its property, including sites used for festivals, campsites built for teenagers, its college campuses, and private aircraft.[citation needed] They discontinued publishing all the books, booklets and magazines published by Armstrong.
To further economize, the church sold its properties in Pasadena and purchased an office building in Glendora, California.