- "By grip or drift, your fate lies in total control of your machine. A race for Group B rally cars."
- ―In-game text

Gr.B Rallycross is a 5 race event that appears in Gran Turismo Sport. It was added to GT League mode in update v1.18. The event is housed in the Amateur League of GT League mode.
The event is aimed at intermediate drivers and is, as the name implies, restricted to cars of the Gr.B category.
Event Restrictions[]
- Maximum Power - None
- Minimum Weight - None
- Maximum Tyre Rating - Sports: Soft (road courses)/Dirt Tyres (dirt courses)
- Gr.B cars only
Races[]
- Sardegna - Windmills (reverse): 7 laps
- Willow Springs International Raceway: Big Willow: 7 laps
- Tokyo Expressway - Central Inner Loop: 7 laps
- Sardegna - Road Track - B: 6 laps
- Colorado Springs - Lake: 7 laps
Prize Structure[]
- 1st: Cr. 62,000
- 2nd: Cr. 38,000
- 3rd: Cr. 30,000
Trivia[]
- On the event description, "Gr.B" is written with a space between words; however, other sections of the game and documentation are also known to be inconsistent whether to use or not use a space in vehicle group names.