BahrainLad,
It works both ways (Prices from ITN.net).
Doha (DOH) to Paris (CDG) Friday, February 14 / Paris (CDG) to Doha (DOH) Friday, February 21
Qatar Airways: QR3050 ($876.30) non-stop
Gulf Air: QR2000 ($597.30) via Abu Dhabi (AUH)
That just proves my above point that all Gulf Airlines do this and not just QR.