Gregory MacCray was a Human male serving in Starfleet in the 24th century. By 2378, MacCray held the rank of captain and served as commanding officer of the Akira-class USS Geronimo.

In early 2378, MacCray engaged the USS Sovereign in war games as a test for the Sovereign's upgraded weapons systems. Shortly after, MacCray and the Geronimo battled Legate Matan's Cardassian insurgents at Starbase 12. MacCray later took the Geronimo to help the Sovereign destroy the Kessok solarformers and participated in the formal first contact with the race. (ST video game: Bridge Commander)

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