You could import or link to the existing pages, add some css styling to it and you're away.
XOOPS 2.0.13.2
//$xoopsTpl->assign('xcgal_main', $temp);
$xoopsTpl->assign('gallery', $xoopsModule->getVar('name'));
main_menu();
//$xoopsTpl->assign('xcgal_footer', pagefooter());
do_footer();
include_once "../../footer.php";
$xoopsTpl->assign('gallery', $xoopsModule->getVar('name'));
to
$xoopsTpl->assign('gallery', 'Gallery');
//$xoopsTpl->assign('xcgal_main', $temp);
$xoopsTpl->assign('gallery', $xoopsModule->getVar('name'));
main_menu();
//$xoopsTpl->assign('xcgal_footer', pagefooter());
do_footer();
include_once "../../footer.php";
//add this next line
$xoopsTpl->assign('xoops_pagetitle', 'Gallery'); // browser page title
$xoopsTpl->assign('xoops_pagetitle', 'Your Title'); // browser page title