YES, it is finished.
This is an original anime and all detected relations are finished. Check the release order section for a complete list of relations.
Here you have all the anime relations we detected ordered by release date, so you can see the reason for this status in context and also use it as watching order.
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Anime - Base
Release date: December 19, 2016
Anime - Sequel
Release date: February 04, 2018
Gan Gan Ganko-chan centers on Gen, a young boy who unexpectedly finds himself transported from the familiar comforts of the year 2020 to a far-flung future.
However, this future is vastly different from what he might expect: humanity is gone.
Gen takes refuge with the Ganko family in their home located in the Rustling Forest, a place devoid of all the modern conveniences he has always known.
The anime explores Gen's adaptation to this drastically changed world, where he must learn to live without electricity, running water, and all the technology he took for granted.
The series focuses on his experiences adjusting to a simpler, more primitive lifestyle alongside the Ganko family.