First, make sure you have Atom 1.19+ installed. Install atom-ide-ui from "Install" in Atom's settings or run:
apm install atom-ide-ui
Then, install ide-golang from "Install" in Atom's settings or run:
apm install ide-golang
You probably need to install some golang tools:
go get -u golang.org/x/tools/cmd/goimportsgo get -u github.com/nsf/gocodego get -u github.com/zmb3/gogetdocgo get -u golang.org/x/tools/cmd/gurugo get -u github.com/ramya-rao-a/go-outlinego get -u golang.org/x/lint/golint
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.