There are two ways you can search in Gorgias: using the ticket search and the customer search.
It searches the following fields: customer's name, email and phone. Ticket subject and the first 5000 characters of each message body.
The customer search is available on each ticket, and on the customer page.
From the ticket, you can search customers by name, email and phone. As well as order's id, tracking number and shipping address.
From the customer list, you can search customers by email address or name for now.