Add your gallery posts to Essential Grid
1. Add a few posts under the "Gallery" admin tab and make sure all posts have:
- Post title
- Featured Image
- Gallery Category (not tags)
2. Go to the "Essential Grid" admin tab and click on the purple "Settings" button of the grid you want to edit.
3. Click on "Source" (see image below)
4. Set the "Post Types" setting to "Gallery"
5. At the "Post Categories" setting select all the categories you want to display (hold ctrl button to select multiple)
6. Save the settings in the top right corner
Now all posts from the selected post categories should be visible in the grid.
To add the grid to any page by using the "Essential Grid" widget by using the page builder. Edit the widget and select the right grid you just configured from the dropdown field.