In Joomla, Phoca Gallery does not give the option in the administration, whether you want to keep Phoca Gallery copyright information in footer or not.
For this you have to edit the code as follows.
Open following PHP file.
SITE_URL\components\com_phocagallery\views\category\tmpl\default.php
Remove the last line
PhocaGalleryUtils::footer();
Very simple.. isn’t it..?