Hi there,
Please try with below code:
import java.awt.Robot
import java.awt.event.KeyEvent
import com.kms.katalon.core.webui.keyword.WebUiBuiltInKeywords as WebUI
WebUI.openBrowser("www.google.com")
Robot robot = new Robot()
robot.keyPress(KeyEvent.VK_CONTROL)
robot.keyPress(KeyEvent.VK_T)
robot.keyRelease(KeyEvent.VK_CONTROL)
robot.keyRelease(KeyEvent.VK_T)
It uses RobotFramework to simulate pressing Ctrl + T hotkeys for opening a new tab in Chrome