Not really.

WebOS (or a variant) seems to be in LG TVs, http://www.cnet.com/news/hands-on-with-lgs-webos-smart-tv-is...

LuneOS is probably more applicable. http://pivotce.com/2014/09/01/official-release-of-luneos-and...

LG hasn't given me a TV to hack on =) so I have no idea how much things have changed under the hood. I liked the Samsung TVs till the recent overly invasive creepiness (mic, ads etc.) Maybe I'll get a LG next time.