Associating email activity with a ticket
At present it is not automatically possible for emails sent/received to a contact(s) associated with a ticket to be logged on that ticket if sent via Gmail, opposed to internally within Hubspot. Instead it has to be done manually within Hubspot, through editing those emails, which do appear on perhaps the company or deal, and of course contact.
It is a shame the same logic for attaching an email to a deal, company or contact is not applied to tickets. If the contact is associated with the ticket, then so should any correspondence be.