The GP is 7 stages. Stages open one a day.
It's a recommended PR event. The usual 3 hour instant service + tuning is available.
Available max tuning for this event is 8776.
Stage goals and rewards and available tuning steps as below: (updated with Stage 7-23/09/2020-Added additional comments in brackets which I think may be useful)
Will add more info to post when time permits and/or it becomes available.