As per licence text, CC-BY-SA only requires that you distribute your contributions to the material (so, in this case, font edits) under the same licence, not that you distribute your projects under that license. So that's LGPL rather than GPL.
As per licence text, CC-BY-SA only requires that you distribute your contributions to the material (so, in this case, font edits) under the same licence, not that you distribute your projects under that license. So that's LGPL rather than GPL.