Most all body panels int/ext should be the same as long as its the same color. Suspension should pretty well be the same as I'd imagine its a 97 GT with the 3.8NA, but likely most will be shot due to age so you wouldn't want to use most of the parts. Motor is going to be different but alot of the sensors should interchange, minus the TB MAF sensor. Trans will be vastly different, stay away from it.

Electronics will be most noticable as 97-99 use basic keys with little to no security, 00-03 use a PK3 key setup and security, wheel buttons are different, the DIC will be different being a NA motor, etc.

What are wanting to get off the car specifically?