Running gc off of a usb drive so you can take gc (and your rides) with you. - GoldenCheetah/GoldenCheetah GitHub Wiki

• Install the GoldenCheetah to your USB drive, thumb drive, whatever.
• Right next to the GoldenCheetah executable on the USB Drive, create a folder called "Library" and inside that folder create another folder called "GoldenCheetah".
• Launch GC from the USB drive, create your cyclist from inside GC.
• Take the rider data and copy it to Library/GoldenCheetah/ (on the USB drive)
• Restart GC, the rides should be there

You can also keep Mac, Linux and Windows versions of the executable on the drive so you have a multi-platform solution.