// this gets called as a hook, but never shows on the page due to low precedence level - strange but works
// it does however show up on /members/admin/groups/ so I hacked it so the name of the sub nav item does not show.
function bp_gtags_setup_nav() {
    global $bp;
    bp_core_new_subnav_item( array( 'name' => ' ', 'slug' => $bp->gtags->slug, 'parent_slug' => BP_GROUPS_SLUG, 'parent_url' => $bp->root_domain .'/'. BP_GROUPS_SLUG . '/', 'screen_function' => 'gtags_display_hook', 'position' => 1 ) );
}
add_action( 'bp_setup_nav', 'bp_gtags_setup_nav', 1 );

function gtags_display_hook() {
    global $bp;
    add_action( 'bp_has_groups', 'gtags_show_groups_for_tag' );
    bp_core_load_template( apply_filters( 'bp_core_template_plugin', 'groups/index' ) );
}


function mybp(){
    global $bp;
    //echo '<pre>'; print_r( $bp ); echo '</pre>';
}
//add_action('bp_before_footer','mybp');