To deposit money with Google Pay, you will need to go to
My Account > Transactions > Deposit and follow these steps:
Select Google Pay
Enter the amount and then select Deposit *
Verification will be requested from Google Pay for the transaction
Once the verification is completed, the amount will be transferred to your account
*In case you have not registered the payment method, when you press Deposit, you will be asked to register the card
For more information about deposit limits, click here