After a few trial and errors turns out its really simple. Just go into the galleria-galleria.php file
look for this section
// run galleria and add some options
and add “lightbox: true” to the listed options
so it should look something like this
// run galleria and add some options
echo “$(‘.galleria-gallery’).galleria({
autoplay: ” . $autoplay . “, lightbox: true,
//height: ” . $height . “,
width: ” . $width . “,
transition: ‘” . $transition . “‘,