I created a dedicated blog template which includes one NextGen gallery. When I a create new blog and choose this template everything else is imported to the new blog except the gallery. I have checked the corresponding gallery db tables in the advanced options for the blog template so they should be created.
Apparently, when I create a new blog based on this template the NextGen gallery tables are cleared in the blog template itself. (I verified the MySQL tables).
I'm using the following:
NextGen Version 1.8.4
New Blog Templates Version 1.3