but there are a plethora of online IDE's that can integrate well with GCP.

I miss Bespin, it later became skywriter, and was eventually integrated into the ACE online editor. For the few times I needed to edit something on the go, and didn't have my laptop, it worked wonderfully. I was not a big fan of the direction it took, moving away from what I would consider a fully opensource platform, to a paid one, but it does its job, and it does it well.

GCP cloud editor uses Eclipse Orion. I am excited to see the expansion of the project, and the direction it takes. Cloud IDE's have always been badass.