Description of problem:

gthumb was dropped from RHEL7.  Would you be willing to maintain an EPEL7 branch? There is no webkitgtk4 at the moment, but 3.3.2-3 at least builds and seems to run okay on my machine.  Another user reports:

** (gthumb:30760): CRITICAL **: Failed to parse arguments: Unable to find suitable fbconfig for the GLX context: Failed to find any compatible fbconfigs

Current master fails to build with:

  CC       libraw_files_la-main.lo
  CC       libraw_files_la-gth-metadata-provider-raw.lo
main.c: In function '_cairo_image_surface_create_from_raw':
main.c:256:18: error: 'libraw_output_params_t' has no member named 'use_rawspeed'
  raw_data->params.use_rawspeed = TRUE;
                  ^

so probably too old a dep there.