Will a car stereo work in a goldwing gl1200?

Short answer, no. Not without some work.

Your GL1200 radio has an external amp for the speakers. Your standard car radio will not work with the amp. You would have to bypass the amp.

Also, the GL1200 radio has a pin connector plug on the back of it. This connector plug has about 30 different pins. You would have to take the end off the bike and directly wire your new radio to the power supply and speakers.

The new car radio will not work with the handle bar mounted control swithes.

The new radio will not have auto volume.

The new radio will not have the intercom system, as that is built into the factory radio.

It could be done, but it would take a lot of work. If your current factory radio does not work, I recommend going to eBay and looking for a used replacement. The radio, when working is a pretty good radio, and gets good reception. If your looking for a CD changer, I would avoid it. I have seen satellite radiOS hooked into the factory radio, but I personally use a FM transmitter for my CD/mp3 player. That way the signal would go through the factory radio on a FM channel and be played over the speakers or through your headsets.