Grid is checked with Bootstrap4 and it is supported.
We'll be publishing an update soon for that.

If you want to test-run with demo here is the link:
https://gist.github.com/gridphp/b622a11579eb8ee4e6c189f35d781cc4

Screenshot:
http://prntscr.com/gn8r7u

Thank you for answering. It look good.
What do I have to do to get the update ?

Regards Gerd

Emailing you details.