Gilles' tracks are hit and miss, mostly miss...

But I kept more than a few, mostly because
@slider666 has put a lot of work in it.
I kept:
Union (Auto Union Ring heavily reworked),
Rivera (Autodromo de..),
Chimay (mostly because it's a Belgian street track, though it's pretty heavy on my system),
Saintonge (Circuit de...),
Gedinne (another Belgian street circuit),
Gotland Ring,
Hethel Lotus,
Penuelas (Autodromo de) pretty heavily reworked,
Beez (Carrières de...) another (Belgian) street track, reworked,
Ingliston,
Jarama,
Lienz (very heavy reworked),
Meadowdale,
Reims,
Cmb (circuit Maison Blanche reworked),
London,
Lydden Hill,
Mettet,
Old Ring Park,
Riberao Preta (reworked),
Shanghai Pudong,
The Bend (reworked),
So that must be about 20% of his tracks that I kept installed (maybe I missed a couple).
One out of five is not too bad though.
Without Sliders work the count would have been much lower...