I took a quick look at the manual provides as PDF.
It says on page 36 (US version):
You can only use the Direction Detection Function when using a compatible lens.
(Refer to the catalogue, website etc. for compatible lenses.)
I have no expierience with panasonic or 4/3ds cameras, but this sounds like the orientation sensor is part of the lens.
So if your lens probably isn't "compatibe" in the above sense, you will not get the orientation info.
That info is written into the Exif data, under "Orientation".
I did not find a way to show that particular info in LR, but there are a lot of free Exif data viewers that will show that tag.
Hope it helps
Dieter