What is the English translation of the Latin quote on the wall of the Cathedral?

I suspect you are referring to the stone, inside, on the stairway leading down to the restrooms. That stone has a “Latin-looking” inscription, GITMO. This however is not Latin, it is the nickname given to the Marines at Guantánamo Bay; the cathedral Dean many decades ago, visited the Marines and preached there, and they sent the stone in return as a gift.

There was a Latin quote on the wall?