Typically not because splitting creates electrical
problems. And no splitter would be cheaper than simply buying
a new USB GPS
for $50 and plugging it into your laptop
. The new 3rd or 4th generation GPSes are incerdibly more sensitive than 80's or 90's models, anything with a SirfStarIII or later chipset should work even under a cored fiberglass deck
. And it probably will be WAAS-enabled, more accurate than the old stuff as well.