GTBank USSD/short codes.

Opening of Account - *737*0#
Airtime(self) - *737*Amount#
Airtime(others) - *737*Amount*phone number#
Fund transfer(GTBank) - *737*1*Amount*Account number#
Fund transfer(other banks) - 737*2*Amount*Account number#
Account number/balance/BVN - *737*6*1#
Prepaid Data - *737*4#
737 PIN creation - *737*5#
Generate OTP - *737*7#
Bills payment menu - *737*50#
Electricity bills
Port Harcourt Prepaid - *737*50*Amount*95#
Port Harcourt Postpaid - *737*50*Amount*96#
Eko Prepaid - *737*50*Amount*151#
Eko Postpaid - *737*50*Amount*152#
Ibadan Prepaid - *737*50*Amount*137#
Kano Prepaid - *737*50*Amount*93#
Kano Postpaid - *737*50*Amount*94#


Source:https://www.techraton.com.ng/2020/12/gtbank-737-transfer-code-features-and.html?m=1