0000000058626f782047616d65706100 is the GUID of the Xbox 360 controller when used with xboxdrv. The GUID is obtained by running controllermap which is part of the SDL2 sources in the test directory.
It can be compiled via
and the output looks like this:
INFO: There are 1 joysticks attached INFO: Joystick 0: Xbox Gamepad (userspace driver) INFO: axes: 6 INFO: balls: 0 INFO: hats: 1 INFO: buttons: 11 INFO: instance id: 0 INFO: guid: 0000000058626f782047616d65706100 INFO: