thanks for your request. You are right - there’s currently no way to put the groupings directly through to the gallery view.
But there’s some workaround idea, which would require some more mouse clicks:
When you create a grouped view, you can also create one single view for each group. I know, this is some extra work: if you have 10 groups, you’ll have to create 10 new views.
Then, in the Gallery plugin, you’ll have to repeat this action: because the views in the Gallery view is independent to those in the base:
Then, for each Gallery view, you’ll go into the settings and select the corresponding view to let this Gallery view only display the contents in each view you created in Step 1.
Again, this would require you to do some extra work on creating views for each group. But - if your groupings is fixed and your daily work is only to add/remove items to or from each group, this method would be great for you as it only costs a 1-time effort.