Where to Find and Catch Gogoat
From Pokemon Go Wiki
Gogoat are found and captured in Nest and Habitat locations.
Nests
Gogoat Nests are locations that consistently spawn Gogoat.
Habitats
Gogoat Habitats are spawn locations where Gogoat is likely to be encountered, but not guaranteed the way a Nest is.
Additional Tips and Information
Best Nests
If you know a really good nest or any of the nests above is really good, list them here: