From 12 years ago IT Support on this forum wrote -
Paul Gilles went into London Bethel from high school. He was overseer of the Public Affairs department until the GB consigned it to the dust, although he still seems to be the Society's official spokesman in Britain. He is widely tipped as the next branch-committee-member-in-waiting. His wife Judith is Australian and used to pioneer is Papua New Guinea.
This link from 6 years ago provides more info
https://www.jehovahs-witness.com/topic/218141/rise-rise-paul-gillies
It is interesting that the OP JWB suggested he might be moved to HQ, possibly as a GB member if he felt he might be anointed at a future time. According to the info he would be 63 years old now.
Even if he was given a position as a GB helper, it sounds more like a demotion from his current position. Maybe they can come up with a new title, no doubt the GB members have plenty of time on their hands these days to come up with one.