The title actually means "How do GPS receivers receive signals from the GPS satellites?" It's not about other satellites communicating with GPS satellites.
TL;DR: They use special-purpose antennas.
TL;DR: They use special-purpose antennas.
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".
'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