Latest release 0.2.5 (sourceforge) is from 2016. There was some development in https://github.com/lxde/gpicview in the last years. That makes 2 patches obsolete. Wayland patch taken from https://bugs.gentoo.org/642294 Fixes a segfault in wayland.
Created attachment 885872 [details] ebuild live ebuild also for release
Created attachment 885873 [details, diff] wayland patch
https://github.com/lxde/gpicview/releases/tag/0.2.6