CSS Grid works in Xway? Is there any possibility to implement it in the Property List?
You should be able to use Extended Properties.
If you don’t need the additional power (and complexity) that Grid Layout offers, the next version of Xway (later this year) will have direct support for CSS Flexbox.
CSS Flexbox will be of great help.
Grid Layout would be less complex if from Extended Properties it could be linked to an external css file.