To start using GCash, OFWs should first download the app from the App Store or Google Play. After registering, you'll need to verify your account by providing identification and completing the KYC process. Once your account is set up, you can add funds through bank transfers, remittances, or even through physical outlets. GCash allows you to pay bills, buy mobile load, and send money to other users easily. For specific guidance, it’s best to check the official GCash website for the latest information and updates.