Deprecated: Non-static method.......

I am getting the following errors and cannot get ride of them. I tired the solutions found here(https://www.gavick.com/documentation/jo ... -error-fix) but they are still showing.
Please help. The site is http://www.ltcwebsitesolutions.com.
Thanks



Deprecated: Non-static method JApplicationSite::getMenu() should not be called statically, assuming $this from incompatible context in /home/ltcweb/public_html/templates/gk_startup/lib/framework/helper.layout.php on line 109

Deprecated: Non-static method JApplicationCms::getMenu() should not be called statically, assuming $this from incompatible context in /home/ltcweb/public_html/libraries/cms/application/site.php on line 272

Deprecated: Non-static method JApplicationSite::getMenu() should not be called statically, assuming $this from incompatible context in /home/ltcweb/public_html/templates/gk_startup/lib/framework/helper.layout.php on line 109

Deprecated: Non-static method JApplicationCms::getMenu() should not be called statically, assuming $this from incompatible context in /home/ltcweb/public_html/libraries/cms/application/site.php on line 272

Hi

Please update template to the latest version. Remember to make a backup of Your site first.