To add an image gallery in ACF without needing the Pro version, you can use the "ACF Photo Gallery Field" plugin. This plugin is an extension of Advanced Custom Fields (ACF) and adds a photo gallery field to any post or page on your WordPress website. It allows you to visually create fields, add multiple photos, and modify titles, captions, and links for each image. Once installed and activated, you can use the acf_photo_gallery function in your theme's code to retrieve and display the gallery images. The plugin provides flexibility in customizing the layout and appearance of your gallery. However, it requires some coding knowledge to implement and customize the gallery layout according to your needs. For more information and to download the plugin, visit the WordPress Plugin Repository. Check out these search results to dig in deeper.