GoBGP can be used as a Zebra's BGP protocol module. To make it work, GoBGP should be configured with appropriate configuration.
By default, Zebra listen to UNIX domain socket /var/run/zserv.api
for Zebra
API. So GoBGP Global configuration look like:
[zebra]
[zebra.config]
enabled = true
url = "unix:/var/run/zserv.api"
No configuration is necessary to Zebra side.