Boone Gorges

CUNY Academic Commons

This plugin adds two widgets to your WordPress MU/BuddyPress installation: Groups and Members. Use them instead of the Groups and Members widgets that ship with BuddyPress. They provide the ability to select which of the three tabs – Newest, Active, or Popular – will be the widget’s default view.
Version 0.2 of this plugin works only with BuddyPress 1.2. For earlier versions of BuddyPress, please download version 0.1 of the plugin.
Developed for the CUNY Academic Commons. Visit http://commons.gc.cuny.edu to learn more about this Totally Kewl project.

Enhanced BuddyPress Widgets

Provides enhanced version of BuddyPress's core Groups and Members widgets

itthinx

This plugin redirects 404’s caused by hits on pages that are protected by <a href="https://wordpress.org/plugins/groups/" rel="ugc">Groups</a>.
The redirection settings can be adjusted in Settings > Groups 404 :
Visits to protected pages can be redirected to:
<ul>
<li>a specific post, or</li>
<li>the WordPress login</li>
</ul>
The redirection can also be applied for restricted categories, tags and other taxonomy terms if <a href="https://www.itthinx.com/shop/groups-restrict-categories/" rel="nofollow ugc">Groups Restrict Categories</a> is used.
The redirect status code can be selected among:
<ul>
<li>Moved Permanently (301)</li>
<li>Found (302)</li>
<li>See other (303)</li>
<li>Temporary Redirect (307)</li>
</ul>

Groups 404 Redirect

I know this plugin hasn't been updated in a couple years, but IMHO Groups and its related plugins (like this one) are a hidden gem for WordPress sites. So many people jump to complicated membership plugins when they could do everything they need with Groups. This 404 redirect add-on works like a charm. I'm using it on the latest version of WP 5.x

Perfect.

Redirect 404's when a visitor tries to access a page protected by Groups.

Enhanced BuddyPress Widgets vs Groups 404 Redirect