https://bugzilla.gnome.org/show_bug.cgi?id=641082#c40 It has been merged. What are the possibilities of a backport?
I'm currently using the following packages (from my overlay) with gnome 2.24 without any issue: app-crypt/gcr-3.28.0 gnome-base/gnome-keyring-3.28.0.2 It should be safe to add these packages to the gentoo repo. No compatibility breaking changes have been made since 3.20.
3.28.x has been in the main tree for a year by now