Not initially. It started with 1 GB at the time the other popular services Yahoo and Hotmail provided 2-4 MB of storage.
Google later changed it to “unlimited” which increased daily by an MB or so. At some point settled at 15 GB.
Google later changed it to “unlimited” which increased daily by an MB or so. At some point settled at 15 GB.
https://gmail.googleblog.com/2013/05/bringing-it-all-togethe...
Not sure if it was unlimited actually before this point.