I was thinking about my long history with the WTS, 64 years. In that time, there have been many members of the GB that have come and gone. I think a few on here are about my age or older might remember some of these men. It seems that it is current trend for new GB members to be mostly from the US.
I looked up the past and current members of the GB and I found this about their place of origin, all white men claiming to be anointed by the time they were appointed to the GB.
Barber-Canada
Barr-Scotland
Barry-New Zealand
Gangas-New Ephesus, Turkey
G. Jackson-Australia
K Klein-Germany
Losch-Austria
Poetzinger-Germany
Fekel-Austria Hungary
Sullivan-Canada
Greenlees-Canada
Chitty-England
Splane-Canada?
In my research I found that the WTS says they started talking about the "governing body" in 1944.
https://wol.jw.org/en/wol/d/r1/lp-e/1971923?q=governing+body+1944&p=par
The official magazine of Jehovah’s Christian witnesses is The Watchtower Announcing Jehovah’s Kingdom. In the year 1944 the Watchtower magazine began to speak about the governing body of the Christian congregation
https://wol.jw.org/en/wol/d/r1/lp-e/1990204?q=governing+body+1944&p=par
Looking back in this “time of the end,” we are not surprised that the members of the Governing Body were at first closely identified with the editorial staff of the Watch Tower Society. (Daniel 12:4) The article “The Theocratic Alignment Today,” published in The Watchtower of November 1, 1944, said: “Reasonably, those who were entrusted with the publication of the revealed Bible truths were looked to as the Lord’s chosen governingbody to guide all those who desired to worship God in spirit and in truth and to serve him unitedly in spreading these revealed truths to other hungering and thirsting ones.”