The description of the achievement is misleading. Just racing in Indianapolis does not work! The race needs to be done on the track layout "The Brickyard Speedway"
I was hoping to do this in career mode.
In Volume 5 - Ultimate Motorsport, the 3rd series is "Ultimate Racing Championship"
I picked the division "IndyCar" and selected the 2015 Chevrolet #9 Target Chip Ganassi Racing IndyCar. In the 5th race, Indianapolis Motor Speedway came up with one of the Grand Prix tracks. After completing the race, the achievement did NOT pop!
Save yourself the hassle and go with the above solution from Zedarboy, works just fine!