Not strictly Big Brother though the contestants live in a BB style house devided into two sections with the boys in one half and the girls in the other.
Homepage
http://lescolocataires.m6.fr/html/index.shtml
Subscription 24/7 feed is on Hotbird (13 East) 10873 V ,27500 3/4 Digital.
Highlights in French Channel M6. A free version is available On the Telecom Satellite at 5 East 12522V Analogue SECAM.
There might be other free Digital versions of M6.
A webfeed does exist but is very expensive.
If you find the live feed the symbol at the top of the picture has the symbols for male/female with a house symbol in the centre of each.