To send money abroad using GCash, simply log in to your GCash account and select the 'Send Money' option. From there, choose 'Send Abroad' and follow the prompts to enter the recipient's details and the amount you wish to send. Please note that there may be limits and fees associated with international transactions, so it’s best to check the current rates and limits on the GCash app or their official website. Also, ensure that the recipient has a method to receive the money, such as a local bank account or a partnered money transfer service.