Had my 201 panel completely rebuilt, factory shock mounted w/new shocks, in 07/2014 with 2 Garmin 650s, audio panel & remote xponder w/existing 796 & STec 55x autopilot. In 01/2016 installed Sandia Quatro as the primary attitude indicator with no issues. After seeing the G-5 @ Oshkosh, ordered it & an upgrade to xponder & some other stuff. All installed in 11/2016. The G-5 was one of the first G-5 units sold. It started displaying wing drop, very pronounced in level flight & more so in decent, on the first flight home. Avionics shop replaced unit with another unit same issue only much less pronounced. At first Garmin blamed the airplane, then the software issue was acknowledged. Had software update done by avionics shop on 02/10/17 & have flown it 5 hrs. since. Appears the software update fixed the issue. Works well. Will update this SITREP after I fly it more. Garmin could not let this issue go not properly corrected.