In order to be able to use other services of your GCash account, you need to get KYCed. It is called “Know Your Customer“.
KYC (Know Your Customer) is a one-time face-to-face requirement. This process required by the Bangko Sentral ng Pilipinas to validate the identity of a customer availing a financial transaction. The customer just need to present one VALID ID to an authorized GCASH KYC outlet.