Bryce, who has had two spells at Scotstoun either side of a couple of seasons with Edinburgh, is leaving Warriors at the end of the season. His new challenge will be to guide GHK to promotion from National League 2 next season.
"I still feel I have lots to give on and off the pitch. I learned a lot during my six years as a professional rugby player and look forward to passing on my knowledge to the next generation of players coming through at Old Anniesland.
"GHK has an amazing history and exciting future. I can't wait to get started and help the club reach its potential".
GHK President Ronnie Gourley said: "We are sure that Kevin's experience will be hugely influential over the coming seasons. With incredible facilities, one of the best grass pitches around, thriving mini and midi rugby sections, and experienced players and coaches like Kevin driving the club forward, GHK presents as a compelling option for any Glasgow-based rugby player.
Glasgow Warriors assistant coach Kenny Murray added: "Everyone at the club wishes Kevin all the best with the next chapter of his life. It is great to see a professional player move back into the club game. The support that GHK will offer as he builds his next career will no doubt be invaluable."