Login to your account on https://my.xbtfx.com
Click on "Platforms" in the Menu on the left side of the screen , then click "MT5"
Click "Create New Account"
Select the account type as "MT5 ECN Live"
Select the currency of the account as "XAU" in the dropdown Menu for currencies, select the Leverage you need and click "Add New Account"
After completing these steps , you are set with your new MT5 Gold Account, with credentials sent to your email for MT5 Access.