GetFEM++ is maintened on the Savannah collaborative development platform for free software. See https://savannah.nongnu.org/projects/getfem for additional information on GetFEM++ development.
The mailing lists of GetFEM++ are listed on the page getfem mailing lists
The main mainling list is the user one. All kind of problems or questions about using, install or improve GetFEM++ can be posted there. Don’t forget to register to the list before to post a message.
If you make contributions to Getfem, you should register to the getfem-commits mailing list.