If you ignored password recovery options at time of gmail signup, you can change your gmail password recovery options any time, it belong to gmail settings.
You can add/edit password recovery email, mobile and security question to recover your gmail password on email, mobile and by typing security answer when you forget gmail password.
You can change password recovery options by following below steps or by Clicking Here
Learn Payment Reconciliation
Settings—Accounts and Import–Change Account Settings–Change Password Recovery Options.