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The gPort was a small adapter board developed by Griffin Technology for Apple Computer's blue & white Power Macintosh G3 computers.[1]


The gPort was introduced in 1999 to add a RS-422-compatible GeoPort to the newly-introduced blue & white Power Macintosh G3, which had eliminated such legacy ports in favor of newer standards like USB.[2] It is also compatible with the early Power Mac G4 with the "Yikes!" logic board configuration. It was succeeded by the g4Port and CubePort to support newer G4 models, including the Power Mac G4 Cube.[3]


  1. Griffin Technology Media Release (gPort), Griffin Technology. 1999-01-12. Archived 1999-04-20.
  2. gPort technical specifications, Griffin Technology. Archived 1999-10-14.
  3. Griffin gPort (B+W G3) & Griffin G4port aka gPort II (AGP macs) (1999) by chrisNova777, OldSchoolAW. 2014-09-25.

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