Does he qualify for OT? Just cause you make a salary doesn't necessarily mean you can't get OT. But I know nothing about Chipotle's pay practices.
I doubt it..

from 2008
chipotle had a lawsuit against them where they weren't even paying manager apprentices/trainees overtime. if they not paying manager trainees and assistant managers overtime, I seriously doubt the general manger is getting overtime as well.
Lawsuits Allege Chipotle Underpaid Employees, Made Them Work ‘Off the Clock’