These look like Lat/Long (Latitude & Longitude) in degrees & decimal minutes.
16 37.838 = 16 degrees 37.838 minutes (+ is north of equator; - is south)
-22 54.020 = -22 degrees 54.020 minutes. (+ is east of Greenwich; - is west)
I will assume that the GPS receiver was set to capture the location in order of Lat/Long. Therefore Lat = 16 degrees 37.838 minutes NORTH and long = 22 degrees 54.020 minutes WEST.
If the GPS receiver was set to capture the location in Long/Lat, the numbers are reversed.
The best way to check is use Google Earth and zoom to the area where you believe the data was captured. At the bottom of your screen, Google Earth will display the Lat/Long of the centre of the display. Us this to confirm the order the data was captured in.