On a side note, one trevally species caught in Mexico is the black jack. Definitely a member of the Caranx family (Caranx lugubris?)
I have not caught a GT yet, but on a few long range trips down to Mexico to the Revillagigedo Islands years ago, I did catch a few black jacks or chopas. These would be a incidental catch when we were fishing for big tuna on live bait and 60-100lb stand up gear. Even on the big gear, these fish pulled hard for their size!
(attached picture for reference only)