I received permission from Oliver Pieper to release the modifications to gyral to bring it up to date with the latest version of Racer and will update for future versions.
link:
http://www.racedepartment.com/downloads/racer-tracks-73/gyral-cg-version-3325/
link:
http://www.racedepartment.com/downloads/racer-tracks-73/gyral-cg-version-3325/