G-Book

G-Book is a telematics subscription service provided by Toyota Motor Corporation in Japan for its Toyota- and Lexus-branded vehicles. G-Book allows users to link with cellphones (such as the Toshiba T003 cellphone). personal digital assistants (PDA)'s, personal computers (PC) and G-Book equipped cars across Japan. It is based on the former GAZOO infrastructure (renamed Toyota Media Service Corporation) of Toyota's membership-based information service and membership system, and it provides interactive information services via vehicle installed touch-screen wireless communication terminals.

The subscription service replaces the need to periodically update in-car navigation systems that use CD, or DVD installed maps that must be updated with the latest information. The maps are sent by internet connections established through the drivers cellphone with a data download plan associated with the cellphone.

A G-Book application can be installed on select mobile devices, thereby providing the technology without having to purchase a vehicle installed with the technology.