I don't have any backing data, but I think vscode with the go extension is pretty popular.
Can confirm. VSCode's Go extension is really nice. I started using Atom for Go, but quickly switched over. The only thing I miss from Atom is the extension that shows inline test coverage.
I'm not familiar with how inline Go test coverage worked in Atom but the VSCode Go extension does include it. There is an action called "Go: Toggle Test Coverage In Current Package" which I think will do the job for you.
(Article author here.) I have the data, and you're right -- a plurality of Go users were using VS Code.
Gogland is great, and especially easy to learn if you've used other JetBrains IDEs (IntelliJ, PyCharm, WebStorm, etc).
It's almost certainly not popular (IIRC vim is the most popular Go editor), but emacs with go-mode & company-go makes an extremely effective editing environment.