Gunnibal is a completed series with 13 volumes. However the english translation is only upto 21 chapters. Since manga is generally popular in France, gunnibal has been translated to french. MTL from french-english is easier than from japanese-english.

I was wondering if you guys could provide links to sites that upload the scans, preferably French as Japanese is hard to translate.

Here's one site: http://www.a-zmanga.net/archives/56263