Yes, pickled garlic is low FODMAP, and has been lab tested by both Monash University and FODMAP Friendly. Monash lab testing shows a low FODMAP serving size to be 3 g, but not becoming moderate ...

If five years ago someone had said I wouldn’t eat a scrap of onion or garlic or my daily Granny ... and put on the low-FODMAP diet, which alleviates symptoms in 70 percent of sufferers.