Origin
Ultimate Marvel Universe
Gail Richards is Captain America, Steve Rogers fiance while he was fighting in World War II. When Steve is revived decades later Gail cannot even bring herself to see him as she has gotten old and Steve has not aged a day.
Concept and Creation
Gail Richards is presumably based off of the Gail Richards from the 1944 Captain America film serial.
In Other Media
Captain America (1944 film serial)
Gail Richards is the secretary to D.A. Grant Gardner, the Captain America of the first film series. She is portrayed by Lorna Gray.
Ultimate Avengers: The Movie
Gail Richards appears both in a photograph of her younger self in 1942 and towards the end of the film as an elderly woman and married to Buck Barnes. Voiced by an unknown voice actress.