technically theres only 4 models offered for each ('maro,RS,Z28,SS and 'bird, formula,TA and hawk), the other crap is "add-on packages"
it seems there's VERY little difference between an 01 firebird with w68&y87 and an 01 firebird gt:
1LE front stabilizer bar (32mm) with harder mounting bushings, link kit, and track bar (with harder bushings).
paint stripes
Ornamentation Package (Includes four Firebird GT decals and one dash plaque.)
GT floor mats
i could easily turn my car into a GT look/preform-alike
for anyone interrested ALL of the firebird models ever made whether it be factory or after market, pretty good read if you have the time.
look here