To send money abroad using GCash, start by ensuring your account is fully verified. Open the GCash app and tap on the 'Send Money' option, then select 'Send via Bank Transfer' or 'International Money Transfer'. You'll need to enter the recipient's details, including their bank account or mobile wallet information. Be aware of the fees associated with international transfers and the exchange rates that may apply. For specific limits and requirements, check the official GCash website or contact their customer support for assistance.