Regarding visual GUI’s for GreenSock there is nothing in existence that can harness the full capabilities of what GSAP can offer. It’s capabilities are just too diverse for a visual interface to be inclusive enough. With most GUI’s that you will find they cater to certain distinct aspects with some doing those things quite well. But because GSAP is virtually infinite regarding what it can animate you will never achieve the fullness of GSAP’s abilities through a singular visual approach. Instead coding GSAP directly using JS along with imagination means the boundaries regarding what you can accomplish will be limitless.