Notes:My aircraft is a 1971 PA28-180, tail number N1995T. The winds aloft forecast for West Georgia were in excess of 90 knots at 14,000 ft MSL. As I climbed through 11,000 into the wind, my GPS showed my ground track was backwards. I briefly leveled off and observed a tailwind of 95 knots and a ground speed in level flight of 210 knots. I then climbed to just under 14,000 ft and turned for optimum tailwinds and saw a ground speed of 205 knots in level flight at that altitude. I then put the airplane into a descent and recorded a peak ground speed of 260 knots as I passed through 11,500 ft. This was observed and video recorded on my Garmin GNX375, my Garmin G5, and ForeFlight on my iPad. I uploaded the video of my flight on YouTube at the following link: https://youtu.be/g4P6k-h-bi0