Hey Jerry,
It looks like you enqueue gsap from a child theme and then enqueue your custom-gsap-scripts.js from the parent theme. If all the scripts are in the child theme you need to use: get_stylesheet_directory_uri().
If you do not have a child theme and are modifying or building a custom theme use: get_template_directory_uri().
Check the console and make sure they are loading and you are not getting 404 errors.