It does not, but UTC does. The GPS broadcast contains GPS time and enough information for receivers to obtain UTC from GPS. > Information in subframe 4 of the

It does not, but UTC does. The GPS broadcast contains GPS time and enough information for receivers to obtain UTC from GPS. > Information in subframe 4 of the NAV message includes the relationship between GPS time and UTC, and it also notes future scheduled leap seconds. In this area, subframe 4 can accommodate 8 bits, 255 leap seconds, which should suffice until about 2330. https://www.e-education.psu.edu/geog862/node/1736 https://www.e-education.psu.edu/geog862/node/1736