How fast does a GP go? GP14 Sailing › Forums › Forum › How fast does a GP go? This topic contains 0 replies, has 1 voice, and was last updated by Mike Senior 6 years, 8 months ago. Author Posts 25/06/2013 at 12:33 pm #1915 Mike SeniorParticipant Here is some data taken from my Garmin GPS watch I use for running taken from a club weekend in New Quay, Wales this weekend. Force 5-7. Moderate Swell. Wind against tide. Upwind Range = 4.3 – 5.4 knots Downwind = 5.4 – 13.01 knots Here is the data – spot the capsize! – Mike Author Posts You must be logged in to reply to this topic.