The USSD code for Guaranty Trust Bank (GT Bank) is *737#. To Use it, dial the code using your mobile phone. It works with the Phone number registered with your account with the bank. With this code you can perform almost all banking operations as you would with your ATM card and internet banking.

Some banking operations you can do with *737# includes;

check account balance

transfer funds

pay utility bills

open bank account

obtain loans

and much more.