I had the same problem and solved it by selling it and buying a Demolet CAI.
A GTS was a 95 GT with cloth seats, no power windows etc..basically a stripped down V6 car but with a V8...
In 96 they offered a version of this car but no longer officially called it GTS but rather a 248A option package. Some call it GTS and don't try to correct them because they will bite your hand off.
Some of the spec sheats from 96 248A actually said GTS on them and got into the hands of customers eventhough GTS was no longer the official name of the stripped down version. Just adds to the confusion that is Ford.