Read sidecar xmp files with main extension
Darktable saves its sidecar files with this format: file.ext.xmp
.
gThumb in other hand reads only file.xmp
files if I understand this correctly:
https://gitlab.gnome.org/GNOME/gthumb/-/blob/master/extensions/exiv2_tools/exiv2-utils.cpp#L941
gThumb should read sidecar files with their extension. If not with default behavior, at least with a togglable option in extension settings.
I could try patching this.