gtg can't run if gtk+3 is not installed, there is a python3 error about some missing Gdk library. I forgot to save the error message.
Following diff installs gtk+3 for runtime and solves the issue. Index: Makefile =================================================================== RCS file: /home/reposync/ports/productivity/gtg/Makefile,v retrieving revision 1.38 diff -u -p -r1.38 Makefile --- Makefile 23 Feb 2021 19:39:36 -0000 1.38 +++ Makefile 21 Sep 2021 14:16:02 -0000 @@ -7,7 +7,7 @@ GH_ACCOUNT = getting-things-gnome GH_COMMIT = 54b2793be236da41549360c5aeb0da5e33a7ff60 MODPY_EGG_VERSION = 0.4.0 DISTNAME = gtg-${MODPY_EGG_VERSION} -REVISION = 2 +REVISION = 3 CATEGORIES= productivity @@ -27,7 +27,8 @@ RUN_DEPENDS= devel/desktop-file-utils \ devel/py-xdg${MODPY_FLAVOR} \ x11/dbus-python${MODPY_FLAVOR} \ devel/py-gobject3${MODPY_FLAVOR} \ - x11/gtk+3,-guic + x11/gtk+3,-guic \ + x11/gtk+3,-main TEST_DEPENDS = devel/py-nose${MODPY_FLAVOR} \ devel/py-mock${MODPY_FLAVOR}