Just a question before I answer yours: do you actually NEED to be on a gluten free diet? Recent studies show that being on such a diet when its not necessary can do more harm than good.

Also, the problem with gluten free diets is that there is no wheat, yes, but a lot of the foods and the gluten free breads have higher levels of fat, so it's not really the best option if you're just looking to lose some weight.

As to what you can and can't eat on a gluten free diet: anything with gluten and wheat. So that includes most breads, yes, unless they specify gluten free, pasta, a lot of cereals, oats (though this is what's considered a grey area), a lot of sauces, a lot of frozen foods, pastry, some yoghurt, ice cream, most lollies and some types of chocolate bars.

If it's MSG you're avoiding, that's something altogether.