Use gcb in link

jQuery(document).ready(function($){
 diplomas_btn = jQuery("#diplomas_btn");
 
 diplomas_btn.on('click', function(){
 check_list();
 });
});

function check_list(){
 var tbrows = new Array();
 jQuery('input[name="gcb[]"]').each(function(){
 if( this.checked ){
 v = this.getAttribute("value");
 tbrows.push(v);
 }
 });
 listrows = tbrows.join(',');

 console.log(listrows);
 if(listrows.length){
 console.log('ok');
 strUrl = "https://your_url?event=your_event&tvout=view&gcb=" + listrows;
 var win = window.open(strUrl, "Diplomas");
 }
}