Hello,
Some time ago I was looking for info on how to animate particles and found it is not something easy to find.
After doing some experimentation I was able to learn a little bit on my own.
Also GSAP documentation is great, make sure you are looking at the right version!
Here is a working demo using React + GSAP 3 on github: https://github.com/npinos/cloud-animations-react-gsap
Live demo: https://oaklandev.com/projects/particle-cloud-animations-react-gsap/index.html