MARC (Maryland Area Rail Commutter) at least USED to be a big user. Their now all retired but one GP40WH-2s used Gyralites instead of ditch lights. A number of MARC's Kawasaki cab cars use Gyralites instead of ditch lights although some have been converted to ditch lights.
MARC's electric's, GP39s, and MP36s do not have Gyralites.
See some MARC videos below
I do miss seeing and riding those GP39s with the Gyralites and jet engine-like acceleration.