There are several things that should allow a bulk select. With only having options to select 1 GPO at a time, reorganizing categories can take a bit of time. Considerable time could potentially be saved if the GPA Repository (and search results) allowed multi-select options.
1. Deleting GPO “links” from a category
2. Moving and/or Copying GPOs between categories
3. Bulk settings Report options would be nice to have
Pretty much standard Windows object handling. If you click on the left and have a list on the right, you should be able to “shift+click” and/or “ctrl+click” and selet multiple items.