Google Apps Script that archives all labeled messages in the Gmail inbox after 2 days

gmailAutoArchive.js

function gmailAutoarchive() {

  // Build the query
  var query = "in:inbox is:read has:userlabels older_than:2d";
  
  // Get the threads
  var threads = GmailApp.search(query);
  
  // Archive the threads
  for (var thread of threads) thread.moveToArchive();

}