For adding the Gallery itself:
Place this code in your theme files, where you want it to appear. In your case, add the following code at your home-page template.php
<?php include (ABSPATH . ‘/wp-content/plugins/featured-content-gallery/gallery.php’); ?>
For placing content inside the gallery:
If you’re just using the default settings, you just need to use the articleimg custom field. Simply add this custom field to each post or page you’re featuring, and add the full URL to the image you’d like to display in the value. If adding custom thumbnails, custom text, or alt tags you need to add the thumbnailimg , featuredtext or alttext custom fields.
If you need more help regarding custom fields, feel free