Just installed Gramps on a mostly-clean system. When I started it up, I got a big popup saying "GExiv2 Module Not Loaded" and gave me a link to instructions for building from source with that enabled. Installing gexiv2 makes that go away.
Gramps will work without gexiv2, but it won't have support for dealing with image metadata.
I looked in the package.yml here: https://dev.getsol.us/source/gramps/browse/master/package.yml and discovered that gexiv2 is listed in the builddeps, but not the rundeps. Sounds to me (having no idea why this might have been done if not by accident) like it should be a fairly easy thing to fix.