Thank you for reaching out to the Quickbooks Community,@kmt0812. To answer your question, you can indeed process payments with a mobile device. Follow these steps to record the GoPayment transactions:
1. Go to the Gear icon on the Toolbar, then choose Import GoPayment.
2. Choose the payment you need to record.
3. Select Recieve Payment. Just a heads up, if you're receiving payments transaction, it will be saved as unapplied payment until it's linked to the invoice.
4. Record the payment for the customer.
5. Save and Done when finished.
Keep me updated and if you have any other questions, let me know.