I usually get my bread from the Union Square Market. There is a popular vendor there that does gluten free products. All though I have not tried. My company did some work for them, and folks who tried their products thought it was very good.

https://offthewheat.com/

And Breads Bakery is a block away and they have gluten free options but they are more pricey.

Also, who makes great sour dough bread in Jersey City? Id luv to not always schlep over to the city.