The easiest way would be to play the sounds in PinMAME or whatever is equivalent these days.

If you want to just do it in the game, pull the U4 ROM chip off the background sound board and put it in a safe place. The remaining sounds should be the sound bites that you wanted.

Never dug inside a GL, but I know it works on HS because I've done it before. HS's sound board is unique, but I don't see why GL would be substantially different. I think this trick works up through System 11B, though the later you get, the more sound bites might live on the sound board itself. You're basically getting any sounds generated by the MPU board, amplified by the sound board, but without background music/sounds mixed in.

Bill

How about talking to Coin-Op Cauldron about repairs?

http://webpages.charter.net/coinopcauldron/Index.html