Hi @cavalierlife,
As of right now WP All Import is not able to import into Gutenberg blocks via any sort of drag and UI. However:
1. Imports using the existing drag and drop UI will end up in a normal Paragraph block
2. Gutenberg blocks can be imported in to using their HTML tags, just like any other HTML element. For example, this is how a paragraph block looks:
<!-- wp:paragraph -->
<p>Nullam sit amet turpis elementum ligula vehicula consequat. Morbi a ipsum. Integer a nibh.</p>
<!-- /wp:paragraph -->
This is how a reusable block looks:
<!-- wp:block {"ref":69} /-->
And this is how a custom block looks from https://wordpress.org/plugins/map-block-gutenberg/:
<!-- wp:webfactory/map {"address":"Starbucks, Siam Square One, Bangkok","apiKey":"AIzaSyAjyDspiPfzEfjRSS5fQzm-3jHFjHxeXB4"} -->
<iframe width="100%" height="300px" frameBorder="0" src="https://www.google.com/maps/embed/v1/place?q=Starbucks%2C%20Siam%20Square%20One%2C%20Bangkok&maptype=roadmap&zoom=15&key=AIzaSyAjyDspiPfzEfjRSS5fQzm-3jHFjHxeXB4" class="wp-block-webfactory-map"></iframe>
<!-- /wp:webfactory/map -->
So, if you need to import in to Gutenberg blocks now, you’ll need to write the HTML tags manually. If you just want to import data and have it appear like it always did, you can do that now.
If you want a drag and interface to import in to Gutenberg blocks, that is not ready yet. We don’t have a timeline for this feature, but worst case scenario it will be available soon after WordPress 5.0 is released.
