How to use in a view an argument like gids[0]= I have a custom content type that is associated to groups. When I create a new item, the URL is /node/add/content_type?gids[0]=xxx, where xxx is the node id of the organic group whose this content will be associated.
One of the field of this content type is a user reference. I wanted that this reference is restricted to only members of this group.
This should be accomplished easily using "select list" as the widget for the user_reference field and selecting a view which returns just the members of the group as the "View used to select the users:". og_members views seems perfect, but unfortunately it works with urls like /xxx and not ?gids[0]=xxx.
I googled a lot and tried several things, even create a new view from scratch, without success.
Any help would be appreciated...
Try Views Arguments Extras that lets you set URL params (gid[0], in this case) as arguments. 
You can also "push" arguments to the View at the User-Reference field's settings page. You just need to return the URL param to the View.
You must configure the View accordingly. 

return $_GET['gid[0]'];