Definitely not finished. Gab is way too sophisticated to be taken down by a simple hack. Likely has good backups and the such. The bigger questions is if the data is compromised, as in the internal database, how much information will be leaked. If you used your real first name and last name on the site it is possible that leftist radicals will attempt to start doxxing people.

This is why it is so important to be pseudonymous online, use aliases instead of real names essentially.