I've changed the name of goffice-0.2.1 ebuild that is in portage and changed keywords form arch to ~arch. On my pc (x86) works good. You can try it on diferent architectures.. The new gnumeric 1.7.6 need this version of goffice Reproducible: Always Steps to Reproduce:
Created attachment 109184 [details] goffice-0.3.5.ebuild
*** This bug has been marked as a duplicate of bug 156984 ***