<div class="element">要素</div> 

.element {
  width: 100px;
  height: 100px;
  background: #000;
  color: #fff;
}

  gsap.fromTo('.element', {
    y: 50,
    opacity: 0,
  },
  {
    y: 0,
    opacity: 1,
    duration: 1,
		delay: .8
  }
  );