@iqmeta
Just in case anyone need it, it’s working, i just added class “itemlist” to ons-list item and below code (i know it’s not efficient but it works.

  ons.getScriptPage().onInit = function() {
      // Hooks are bound to the page element
  var divGD = ons.GestureDetector(document.querySelector('#myList'));
  divGD.on('swipeleft', function(event) {
  console.log(event.target);
  if(event.target.classList.contains('itemlist'))
  removeFadeOut(event.target,500);// event.target.parentNode.removeChild(event.target);
  else if (event.target.parentNode.classList.contains('itemlist')){
              // console.log('swiped - '+event.target.parentNode.id);
              var el=event.target.parentNode;
              removeFadeOut(el,500);// el.parentNode.removeChild(el);
              console.log("es list-item");

            }
            else{
              var el=event.target.parentNode;
              // console.log('superpadre'+el.parentNode.id);
              console.log(el.parentNode.classList);
              if(el.parentNode.classList.contains('itemlist'))
              removeFadeOut(el.parentNode,500);// el.parentNode.parentNode.removeChild(el.parentNode);
              else{
                var el=event.target.parentNode.parentNode;
                if(el.parentNode.classList.contains('itemlist'))
                removeFadeOut(el.parentNode,500);// el.parentNode.parentNode.removeChild(el.parentNode);
              }
            }
});
      
      this.onShow = function() {
  
      };
    };
    function removeFadeOut( el, speed ) {
    var seconds = speed/1000;
    el.style.transition = "opacity "+seconds+"s ease";

    el.style.opacity = 0;
    setTimeout(function() {
        el.parentNode.removeChild(el);
    }, speed);
}