Here is the code

// GLOBALS
 //Array of file extension which you would like to extract to Drive
 var fileTypesToExtract = ['xlsx'];
 //Name of the folder in google drive i which files will be put
 var folderName = 'FOLDER NAME';
 //Name of the label which will be applied after processing the mail message
 var labelName = 'LABEL NAME';

function doGet()
 {
 GmailToDrive();
 var textOutput = ContentService.createTextOutput("Success");
 return textOutput;
 }

function GmailToDrive(){
 //build query to search emails
 var query = '';
 //filename:jpg OR filename:tif OR filename:gif OR fileName:png OR filename:bmp OR filename:svg'; //'after:'+formattedDate+
 for(var i in fileTypesToExtract){
 query += (query == '' ?('filename:'+fileTypesToExtract[i]) : (' OR filename:'+fileTypesToExtract[i]));
 }
 query = 'in:inbox has:nouserlabels ' + query;
 var threads = GmailApp.search(query);
 var label = getGmailLabel_(labelName);
 var parentFolder;
 if(threads.length > 0){
 parentFolder = getFolder_(folderName);
 }
 var root = DriveApp.getRootFolder();
 for(var i in threads){
 var mesgs = threads[i].getMessages();
 for(var j in mesgs){
 //get attachments
 var attachments = mesgs[j].getAttachments();
 for(var k in attachments){
 var attachment = attachments[k];
 var isImageType = checkIfImage_(attachment);
 if(!isImageType) continue;
 var attachmentBlob = attachment.copyBlob();
 var file = DriveApp.createFile(attachmentBlob);
 parentFolder.addFile(file);
 root.removeFile(file);
 }
 }
 threads[i].addLabel(label);
 }
 var fileid = file.getId();
 var sheetid = xlsx2sheet(fileid);
 saveData(sheetid);
 }

//This function will get the parent folder in Google drive
 function getFolder_(folderName){
 var folder;
 var fi = DriveApp.getFoldersByName(folderName);
 if(fi.hasNext()){
 folder = fi.next();
 }
 else{
 folder = DriveApp.createFolder(folderName);
 }
 return folder;
 }

//getDate n days back
 // n must be integer
 function getDateNDaysBack_(n){
 n = parseInt(n);
 var today = new Date();
 var dateNDaysBack = new Date(today.valueOf() - n*24*60*60*1000);
 return dateNDaysBack;
 }

function getGmailLabel_(name){
 var label = GmailApp.getUserLabelByName(name);
 if(label == null){
 label = GmailApp.createLabel(name);
 }
 return label;
 }

//this function will check for filextension type.
 // and return boolean
 function checkIfImage_(attachment){
 var fileName = attachment.getName();
 var temp = fileName.split('.');
 var fileExtension = temp[temp.length-1].toLowerCase();
 if(fileTypesToExtract.indexOf(fileExtension) != -1) return true;
 else return false;
 }