Hello, I have been wondering whether you know which file in GK Resume Template I should open to remove Joomla Copyright text ("Joomla! is Free Software released under the GNU General Public License.") in the Footer (as described in your previous article here: https://www.joomlart.com/documentation/joomla-faqs/copyright-removal). I feel I almost "got there", just cannot find the right line. 
Joomla Copyrights Removal from the GK Resume Template
I found the solution (creating override and then going to html folder to the mod_footer and changing default.php).
It is explained well here:
(https://www.bing.com/videos/search?q=how+to+change+text+in+joomla+footer+module&docid=608053570113508191&mid=F78845C77DF75D047A2CF78845C77DF75D047A2C&view=detail&FORM=VIRE)
Yes, it's often defined in language file:
/language/en-GB/mod_footer.ini
MOD_FOOTER_LINE1="Copyright © %date% %sitename%. All Rights Reserved." ; Note : %date% will be auto replaced by current year! Don't translate
MOD_FOOTER_LINE2="<a href=\"https://www.joomla.org\">Joomla!</a> is Free Software released under the <a href=\"https://www.gnu.org/licenses/gpl-2.0.html\">GNU General Public License.</a>"
MOD_FOOTER_XML_DESCRIPTION="This module shows the Joomla! copyright information."To override, you can simply go to Backend >> Language Overrides >> and override language constants:
MOD_FOOTER_LINE1
MOD_FOOTER_LINE2