He is American, but any further details are unknown.
In fact, GBW is renowned for being one of the most shadowy and elusive of all the Members, the more so because he has been around since the Old Board.
He is not to be confused with G. Bone or RGB.
In AH.com The Series, GBW is the AH.com Ship's second pilot. His character is sometimes neglected by writers, but often pops up with his catchphrase when the AH.commers are trying something truly crazy. He also is a frequent pilot of the AH.com shuttles.
Arguably GBW's initial lack of appearances eventually resulted in the birth of a deeper and more complex character than most in the AH.com Series, as he didn't have so much of a single schtick or catchphrase to be reduced to. GBW's deeper nature is glimpsed towards the end of Series 2 and throughout Series 3.
In Luaky Commer, GBW was initially used in the 'Neville' role (although he was in House Knowitall) but, after a nasty incident with Mynx, he vowed revenge and took on the 'Malfoy' role after the death of Romulus Augustulus, or Borat.
In AH.com WARS GBW was an assistant to General Ward and then fulfilled the General Madine role. Due to clever workarounds, a different GBW also appeared in the prequels in connection with the Kaminoans, which were re-set in his Yamania scenario.
In Chris' Multiverse War Book 6 (The Spacers) he gave his name to the Mayor of Ceres.