Hello,
is it possible to import, edit and export CityGML with SketchUp?
Have a read through here
That post is still inconclusive and the plugins are: not working, buggy or 200 euros license cost.
You will not get more help if you ask your question in several posts.
Don’t worry, I asked once, just after read and commented here.
The original question was
And my answer was yes it is, there is a plugin for it. They didn’t ask for a free Plugin so yes if it costs £200, If you want a way to do it for free then ask for that.
bravo congratulations