Their cigarettes were spread throughout the Commonwealth as can be seen by their presence in old buildings and even in the vaults. Cartons were sold at all Red Rocket gas stations and multiple other stores. They are still used by the present-day inhabitants, and various companions will sometimes smoke one.
One of their billboards can be found in the Quincy ruins. It is next to a large two-story building to the north of the overhead highway.
Grey Tortoise appears only in Fallout 4.