http://www.dpreview.com/reviews/panasonic-lumix-dmc-gx8-review

I can't find any information about it in google? does the gx8 have in body stabilization for video or not?

Read topic starting from first page.

http://prophotosupply.com/newsdesk/2016/03/panasonic-gx8-review/

More from DPReview review

The GX85 is capable of 4K video capture at both 24 and 30p at up to 100Mbps and can make use of its 5-axis image stabilization (when using a Panasonic lens with IS) during capture. In use, we found the GX85 offers similar IS performance during video as the Olympus Pen-F, a class leader. However, the Olympus isn't capable of 4K capture like the GX85.

Adding to its appeal, the GX85 offers ample video tools like focus peaking, zebra pattern, audio level monitoring/adjustment and a wind filter. And users can shoot video in any of the manual exposure modes. Unfortunately, like the GX8, you can not use Auto ISO in manual mode during video capture along with exposure compensation, to adjust brightness.

Video quality looks excellent though, with good detail and color. And while the GX85 does have a built-in stereo microphone, it lacks sockets for an external microphone or headphones.

http://www.dpreview.com/reviews/panasonic-lumix-dmc-gx85-gx80