Tracy Morgan is so committed to fighting the anti-gay message he spewed during a recent comedy routine in Nashville -- he's going back to the city next week ... to apologize to everyone he offended  face-to-face.



Tracy spoke with Jarrett Barrios today -- the President of the Gay and Lesbian Alliance Against Defamation -- who tells us, GLAAD reached out to Tracy about an in-person apology in Nashville next week ... and Tracy agreed on the spot.

If that weren't enough -- Barrios tells us, Tracy also plans to visit homeless gay teens at the Ali Forney Center in NYC this week ... teens disowned by their parents because of their sexual orientation.

The cherry on top -- Tracy also plans to film a PSA for GLAAD's upcoming "Amplify Your Voice" campaign.