EDIT

    $gallery_html = '';

    if (count($imageUuids) > 0) {

        $gallery_settings = getGallerySettings(CDM_DATAPORTAL_SPECIMEN_GALLERY_NAME);

        $captionElements = array(

            'title',

            'rights',

        );

        $alternativeMediaUris = array();

        foreach($images as $image){

            $alternativeMediaUris[] = path_to_media($image->uuid);

        }

        $gallery_html = theme('cdm_media_gallerie', array(

            'mediaList' => $images,

            'galleryName' => $galleryName,

            'maxExtend' => $gallery_settings['cdm_dataportal_media_maxextend'],

            'cols' => $gallery_settings['cdm_dataportal_media_cols'],

            'maxRows' => isset($gallery_settings['cdm_dataportal_media_maxRows']) ? isset($gallery_settings['cdm_dataportal_media_maxRows']) : null,

            'captionElements' => $captionElements,

            'mediaLinkType' => 'LIGHTBOX',

            'alternativeMediaUri' => $alternativeMediaUris,

            'galleryLinkUri' => NULL,

        ));

    }

    return "<br>".create_label($galleryName)."<br>".$gallery_html;