Installation method will vary depending on which Goldwing you have (1000, 1100, 1200, 1500, 1800). If you buy a correct antenna, it will come with instructions.
If you just want to install a nonspecific universal type CB antenna, you will need to create a suitable mount. You will also need to use a no ground plane type antenna.
The OEM style CB (again, dependent on year) will integrate with OEM radio and controls and headset system. It does not use a common CB connection for the antenna and you will need an adapter or install a different coax connector if using a universal type antenna.