Does Snapchat show who checked your location?
A direct answer, followed by what Snap Map does show instead.
No. Snapchat does not maintain or show a list of who viewed your location on Snap Map, and it sends no notification when a friend checks, or when you turn Ghost Mode on or off.
Snap Map shows your location to the Snapchat friends you’ve allowed to see it, but there’s no viewer list and no notification tied to the act of looking.
What Snap Map does show
Per Snapchat’s own Snap Map documentation, friends with access can see your live position on the map whenever they open it - there’s simply no record kept, on either side, of when that happened.
If viewer transparency matters to you
glancy keeps a permanent access log alongside real-time access notifications - see the full comparison in glancy vs. Snapchat Snap Map.