There has been some Gn15 in the past? The best way to find any is to go to their website [http://blog.voielibre.com/] click on 'English Translations', then click, 'Click to get your translations', you can then read the English translations of the Magazine from VL32 to VL80. The latest copy is VL81.
You should always go to the last one first!
You should cross all your bridges before you come to them!
Life is too short for counting rivets!
What happened to things that you dropped before Newton discovered Gravity?