1 hour ago, ElsieD said:What is a GN pan?
A GN pan is a Gastronorm pan... more info on Wikipedia https://en.wikipedia.org/wiki/Gastronorm
The US version is usually called a hotel pan and the standard sizes are in inches (vs. Gastronorm pan are sized in mm). https://www.webstaurantstore.com/52489/stainless-steel-steam-table-pans-and-hotel-pans.html