Bob,
Your question does not seem to have anything to do with Groupjive, which may account for the lack of response. I'd like to help you out if I can.
First, as far as a gallery component, I really like Joomgallery (
www.en.joomgallery.net/
). It is very flexible and incredibly easy to use. It is also quite powerful. The best part is that they offer a plugin that will automatically create a category for each registered user of your site whenever they sign up. They can then only create subgalleries under their main gallery (which is named with their chosen username). It just plain WORKS, right off the bat. In addition, it stores the photos in directories on your server named for the categories. This really helps you locate files on the server, and is a real benefit should you ever wish to change extensions. Do yourself a favor and check it out. After all, it's free;)
As for content submission and management, I really find the Ninja Content extension to by incredibly useful (from NinjaForge
www.ninjaforge.com
). This is the only extension I've found that not only allows you to customize how simple or complex a front-end user's submission palette is, it also gives you the ability to list out articles just like on the back-end! So, users can add, edit, delete, publish, unpublish - just like in the admin panel, but without having to provide back-end access. Trust me on this - a membership with Ninjoomla will pay for itself with this one extension.
Also, if you're not using it, I suggest using JCE as your editor (
www.joomlacontenteditor.net/
). Makes your life a LOT easier.
I hope this helps!