gas_to_html.gs

function doGet(req) {
  var output;
  if(req.parameters.cmd == "res"){ https://～?cmd=res
    output = HtmlService.createTemplateFromFile("result");
    output.name = req.parameters.name; // https://～?cmd=res&name=XXX
  }else{
    output = HtmlService.createTemplateFromFile("index");
  }
  return output.evaluate();
}