@kyle-cluso, Hi, welcome to the forum. Please read How to get the best out of this forum.
Please always post as much information as possible. It gets frustrating to have to ask back!
No, GDEM029E97 is not supported by GxEPD2, nor by GxEPD.
You can try an other driver class for 2.9" b/w, but there is no guarantee it will produce correct results.
Please always report which constructor line (old style) or driver class definition line you selected.
Jean-Marc