Graham crackers were invented in 1829 in New Jersey by Sylvester Graham. They were originally made with graham flour which is a combination of finely-ground unbleached wheat flour with the wheat bran and germ coarsely ground and added back in providing flavor.
They were originally a mild food, but are more commonly known today as a sugar or honey sweetened baked food which comes close to being a cookie.
So can gerbils eat Graham crackers?
Unfortunately they are far too sweet for gerbils to eat as they use large amounts of refined sugar and also honey to add to the flavor.
This makes them a food to avoid as far as gerbils are concerned.