Removing /etc/xdg/autostart/gnome-keyring-gpg.desktop makes gnome-keyring not to overwrite GPG_AGENT_INFO with its own stuff. But I don't know how to do this on a per-user basis.
Removing autostart/ gnome-keyring- gpg.desktop
/etc/xdg/
makes gnome-keyring not to overwrite GPG_AGENT_INFO with its own stuff. But I don't know how to do this on a per-user basis.