How do you display a pane in an organic group?
This is what you need to do on the view content pane:


Relationships: "Group membership: Node group membership"
Contextual Filters: "(group membership) OG membership: Group gid"
Pane settings: Argument input: From context > Og group ID


On the panel contexts:


Contexts: OG group > Og group from context


Then you should add the view content pane to the panel pane and the argument should automaticaly be set to "OG membership: Group gid" > "OG group".

These are required for it to work, and I'm currently using them.