Hi!
True, nothing can be found about it and yet a lot of people are having issues with this.
It could be the following IC on the motherboard: STMicroelectronics [link|http://www.ubmtechinsights.com/teardowns/sony-playstation-vita-teardown/?pi_campaign_id=13825|3GA51H|new_window=true] gyroscope
Which can be found here: [guide|7872] (Step 20).
This is probably the only thing that can be found regarding the Gyroscope...