Interesting question, at first i assumed it was the connect premium sat nav, howeverother sites state the 7 speed auto box references the gt ultimate. Then i found this
Nissan 370Z key features:
Keyless entry
Engine start button
Electric seats
Climate control
18-inch alloys
Automatic xenon headlamps
Driver, passenger and curtain airbag
Audio with auxiliary input and Bluetooth telephone integration.
The GT Pack adds:
19-inch RAYS alloys
heated suede and leather seats
Six-CD, eight speaker Bose audio upgrade
Cruise control
Speed limiter
Synchro Rev Control
The GT Ultimate adds:
Persimmon suede leather trim
European DVD sat-nav, with hands-free facility