If you want to animate anything CSS-related, you need to load CSSPlugin. Or just load TweenMax which has all the common tools and plugins (both TweenLite and CSSPlugin are in there).
CSSPlugin:
https://cdnjs.cloudflare.com/ajax/libs/gsap/1.20.4/plugins/CSSPlugin.min.js
TweenMax:
https://cdnjs.cloudflare.com/ajax/libs/gsap/1.20.4/TweenMax.min.js
Oh, and you don't have to use that querySelector() stuff - GSAP has it built in. So you can simply do this:
TweenLite.from("#myDiv", 1, {left:-200, rotation:-90, scale:0, delay:1.5});
Does that help?