See Marshall for other articles with titles that contain, either by relationship or by coincidence, this character's surname.

Gabriel Marshall was a male Human who served in the Federation Diplomatic Corps in the mid 2370s.

Following the rediscovery of the USS Defiant in Tholian space in 2376, Marshall and Commander Grelin met with Admiral William Ross and Captain Montgomery Scott, requesting a retrieval team which could recover the vessel quickly and cause limited damage to the Federation's tenuous relationship with the Tholian Assembly. (SCE eBook: Interphase, Part One)

Several months later, Marshall was assigned to deal with the crew of a Senuta ship which had become stranded in Federation space following an engine malfunction. (SCE eBook: Foundations, Book Three)

Later in 2376, Marshall was aboard the USS da Vinci in order to mediate a dispute between the governments of Rhaax III and its colony world, Rhaax V, or Numai. (SCE eBook: Grand Designs)