Gran Turismo's 2019 FIA Online Championship: Season Recap and Final Driver Rankings

3,792
Canada
Canada
Kaizen-Teian
Is there actually a prize for winning? A car perhaps?

Prizes are in the form of travel expenses.

This is from 2018 season (last year) for the Americas Region,

The invitation to the Americas Nations Cup Regional Finals Live Event includes a trip for one to a city in the United States, which will be confirmed by Sponsor on September 15, 2018. The trip package will include, round trip coach class airfare for one (from major airport nearest to winner’s home), double occupancy hotel accommodations for two (2) days and three (3) nights, and transportation to and from event. The approximate retail value (ARV) for each Nations Cup Winner prize is $3,000.00 USD. The total ARV for the Nations Cup Winner prize is $90,000 USD.

....The ARV for each of the Manufacturer Series Winner prize is $10,000 USD. The total ARV for the Manufacturer Series Winner prize is $160,000 USD.

https://www.playstation.com/en-ca/legal/fia-gran-turismo-championships-2018-official-rules/