Gutenberg editor will be included in WordPress version 5.0 (available from late November 2018).

Currently our themes use their own Page Builder which should run without problems in parallel with Gutenberg. The problem with existing Gutenberg implementation is that it does not feature all needed structural CSS grid elements at this moment (for example inner row within a column).  This means that multi column layouts cannot be supported and that is essential for our themes. Once they introduce functional grid in Gutenberg, we will include Gutenberg support for our themes.

Note that the classic editor will be available as a plugin if needed.