Red Hat Bugzilla – Bug 494430
GCX lacks association with FITS files
Last modified: 2009-04-07 06:12:21 EDT
Open a nautilus window, select a .fits file and right click -- to option to open with GCX!
You should add an association with image/fits mime type. See ds9 and skyviewer image for an example (spec file and desktop entry)
Fixed in gcx-0_9_11-7_fc11.