Guild Bounty Routes, follow the path of Bounty Targets. They don't have any beginnings or ends, but often cross waypoints.
You can toggle them in the GW2TacO / BlishHUD menu -> Tekkit's Guides - Guild Missions -> Guild Bounty. If you don't see these routes in the game, double-check if you properly followed Installation Instructions. If you still have issues, let me know in the #all-in-one-issues channel on our Discord