To answer some of the ensuing questions in advance, suspension parts and exhaust parts (from the catalytic converter back) are interchangeable between the RS, GS, and GS-T 2G models.
Interior and exterior body components are interchangeable between the all models.
Brakes are interchangeable between all models.
Electrical connections and wire colors are usually the same with regard to universally present/available parts (i.e. taillights, moon roofs, speakers, etc), but otherwise they are different.
Obviously the engine, drivetrain and ECU are different between the models. This includes all engine wiring harnesses, fuel injectors, fuel rail, intake, downpipe, clutch, radiator, and accessories (power steering, alternator, air conditioning, etc.).
If in doubt, the GS-T has more in common with the GS and RS than the GSX (although I doubt you'll ever be scavenging parts off of a 2G GSX).
For the record, most suspension components, and even a few interior and exterior components (door handles, center console, etc.) are interchangeable between Eclipses and cloud cars (Stratus, Cirrus, Sebring) of the right year (roughly 1995-2002) and trim level.
I know, that's mostly the interchangeability between the DSM models, but look at the last sentence.
becareful with the the Neon Block being called the same. That statement is not altogether wrong but not altogether correct.
The Neon 2.0 DOHC bottom end is a direct fit for your 2gnt. Compression is the same; however the PCV system in the 95 was different. The PCV lines entered the block in the front with 2 large lines. These need to be capped off in our cars.
The Neon 2.0 SOHC bottom end is different but will work. Compression is lower, pistons are different. Again the 95 block had the different style PCV system that needs to be capped off.
All neaon heads are different and wont work without a lot of modification.
The Jeep TB's are from the staight 6, 4.0l engines in the Cherokee class. I believe that they are from 91-99. Don't quote me on those exact years. I am just giving you info because I see no answers for you yet. Check out this link for install. It was, to me, the best out there: