gnome-bluetooth is collection of widgets for applications that want to select Bluetooth devices. It is also used by GNOME session components such as the Settings and gnome-shell.
[1]: Note that read/write access to the /dev/rfkill device is required and should be provided by the distribution
A long time ago, gnome-bluetooth was a fork of bluez-gnome, which was:
Copyright (C) 2005-2008 Marcel Holtmann <marcel@holtmann.org>