Which Gran Turismo game was known as Gran Turismo 2000 during E3 demos?

Gran Turismo 3: A-Spec was known as Gran Turismo 2000 during E3 demonstrations.

The game was originally planned under the title Gran Turismo 2000, reflecting its intended release around the turn of the millennium. Development delays pushed the launch into 2001, and the final version was renamed Gran Turismo 3: A-Spec. It became the first main Gran Turismo title for the PlayStation 2.

The change was more than a simple title update. Gran Turismo 3 introduced a substantially rebuilt engine, improved lighting and car models, new pit and maintenance features, and a revised vehicle roster. It included 19 race courses, with many fictional circuits alongside real locations such as Laguna Seca Raceway.

The “A-Spec” subtitle distinguished the standard player-focused edition from later Gran Turismo 3-related releases and concepts. Gran Turismo 4 followed in 2004, while Gran Turismo 5 was still years away, making those titles common wrong answers for this question.