How so? The summary of the article at the bottom of TFA, helpfully labelled "Summary", says this:
GPS antennas, located on satellites, spread across the globe, integrated into application receivers, make possible the systems that keep us on time and on track.
Sounds like parent might not be completely right, but they're certainly not "completely wrong".
The antenna is not the special part. The special part is the signal processing magic that allows decoding of extremely weak signals. Also, the antennas on receivers are dramatically different then the antennas on the satellites.
'they use special-purpose antennas' is as misleading an answer as 'they use electricity' or 'they use radio waves'. even the summary of the article doesn't claim the antennas are special
GPS antennas, located on satellites, spread across the globe, integrated into application receivers, make possible the systems that keep us on time and on track.
Sounds like parent might not be completely right, but they're certainly not "completely wrong".