There are a few articles about Gilles in the last issue of Grand Chelem.
It's about "The Fantastic Four". Gilles is The Thing, Richard is the Invisible Man, Jo The Human Torch and Gaël Mr. Fantastic.
It's free, you can download it here:
http://v2.welovetennis.fr/medias/mag...ag10.BSDEF.pdf
I haven't read it yet, I don't know if there's anything interesting.