Had a walk round the shed with my camera earlier:
GT1 has
Optional sunroof
Optional Toyota alloys
Genuine Toyota rear plate surround
Genuine Toyota warning triangle
Optional Momo steering wheel
TRD gearknob
Optional carpet mats (could only find the rear centre one)
Optional parking lamps (doubt I'll fit these anywhere but in the boot)
Two sets of snow chains
Also has the optional blue interior plastics too which is a curse.
EDIT - Also a very kind importer-type person in England sent me a full Toyota ICE system which was nice of him. Still to be fitted though, will wait until I revamp the interior for that.
Jay