VSCode is only GPU accelerated in the same way every website is GPU accelerated - text rendering is done using the DOM. Every program on your computer is GPU accelerated in that sense.
And most of the animations, and layouting. So "only" all the performance hotspots.
> Every program on your computer is GPU accelerated in that sense.
No, not really. At least not on win32 and anything Linux/BSD-y, some toolkit( version)s can do it, but that by no means implies every program uses it.