Yikes! Found this at leapsecond.com 

GPS, Global Positioning System time, is the atomic time scale implemen
+ted by the atomic clocks in the GPS ground control stations and the G
+PS satellites themselves. GPS time was zero at 0h 6-Jan-1980 and sinc
+e it is not perturbed by leap seconds GPS is now ahead of UTC by 15 s
+econds.

[download]
I'm not sure if your hardware is compensating for this diff and/or if it's just outputting standard UTC and saying it's GPS. You're better off listening to someone more GPS aware than I am (that is if you're really worried about that 15 second gap).

-derby

In reply to Re^3: Converting GPS seconds to readable time&date by derby
in thread Converting GPS seconds to readable time&date by flamey

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