gogoc is gogoCLIENT, which is needed to connect to Freenet6 tunnel.

Freenet6 Tunnel is an IPv6 access service which enables thousands of people
from all over the world to experience the best solution for a smooth and
incremental deployment of IPv6. Freenet6 Tunnel users can get IPv6 connectivity
from anywhere, including from behind any NAT device or from outside of their
home network.

WWW: http://www.gogo6.com/freenet6