Open .gan files from Sharepoint

We are trying out GantProject here at the office, i have placed a few *.gan files on sharepoint, but when I then try to open them from Sharepoint it seems that Sharepoint does not recognise the fileextenstion and thinks it is a folder. Is there a way to solve this so that Gant Project is launched when I click a gan file inside Sharepoint?

IMHO, this is not a GP issue, but a Microsoft configuration to be set.

Ok i thought that you might have heard of this before and had a “soluton” for it.