There are 3 dedicated subforum for GI, here:
http://www.ageod-forum.com/forumdisplay.php?f=124This is a third party title, ie it is distributed by AGEOD but is not made by the developement studio, named AGE-studio, where all the team resides.
As a reminder: AGEOD act as a publishing company. AGE-Studio is a dev studio.
As a matter of fact, what can be muddy to you, is that the design of Great Invasions, has been done by Philippe Thibaut
but the development was made by Luca Cammisa, an Italian developer not affiliated to the studio.