There are a number of museums dealing with the oil industry, transportation
and related issues, but I'm not familiar with a specific gas station going all
out.  There's a FLW gas station largely intact in Northern Minnesota,
(actually  NORTHERN Minnesota is a difficult to define place...extending from
somewhere just south of the North Pole to somewhere just south of the Canadian
border, where things occassionally get cold, even by local standards.)  The
shame is that there are so many fruit stands and reused buildings out there
that are clearly early 20th century gas stations, which are being lost.

-jc