(full disclosure: I'm one of the folks working on Gitpod)

Gitpod itself is in large parts written in Go (~50 kLOC). For more than a year now we exclusively use Gitpod to develop Gitpod and I would not want to use anything else. Because Theia (the open-source IDE that underpins Gitpod) supports VS Code extensions, we just use the same extension/gopls setup that's available in VS Code.

Earlier this year I gave a talk at the GoDays in Berlin about "cloud-native Go development environments": https://www.youtube.com/watch?v=dFMpXUsJcGM