I have added BT to scanners in the past. It's just a very basic BT transmitter that plugs into the headphone jack on the scanner and provides nothing but audio to a BT capable speaker or headphones. I think the one I used was a cheapo from Amazon, I know there are others of better quality, though. TaoTronics, Blue Sense and Sena are a few manufacturers.
If you're looking for something more than just audio, you could try one of the bluetooth serial adapters. That would allow a wireless serial data connection over bluetooth between the radio and another device (pc). I don't think audio is available on the scanner serial ports, so you's need another bt setup for the audio side.
As far as compatibility, if the scanner has a headphone jack, you can send the audio over BT. The hardest part may be pairing to the transmitter. I bought one that simply would not pair to anything, can't remember which one it was, though.
Jeff.