"We always talked about the bus all the GB were on to visit the farm and getting hit by a train then "poof" into the pearly gates and here we go GT!"
I imagine that it is policy to never have all the GB be together and particularly not to travel together, like the semi-mythical Coca-Cola executives who know the secret recipe.
Do the GB even meet physically any more? The most recent photo of them seated around a boardroom table is years old and seems to be Photoshopped on occasion to add/remove members*.
* This photo and its variants have popped up from time to time since I've been on here. Don't ask me to find the link; I just remember it being discussed, probably in threads featuring Tony Morris.