Having trouble getting gluten free bread to rise
I imagine you have tried recipes already with an appropriate quantity of xanthum gum and starches... are you making any substitutions, or omitting ingredients? 

Substitutions really change the game significantly, even unwitting substitutions like sweet rice flour vs white rice flour, potato flour vs potato starch. Substituting an alternative flour directly for wheat flour in non-GF recipes won't work (unless you find a GF flour blend that specifies so - for bread, I haven't).

And when I started GF baking I omitted some tiny amounts of ingredients as I didn't want to go out and buy a whole packet/bottle of something just to use a few grams. Turns out some of those little things were absolutely essential. Don't skimp on them. Also, if using yeast, you can take a little bit and proof it to make sure it's not the dud.

Try finding a specifically gluten-free bread recipe with many positive comments, so you are sure it's not the recipe that's the issue.

Personally, my first proper attempt with no subs or omissions at making bread (my first GF bread, and first bread loaf ever - so it had to be foolproof for me) was with this recipe and it rose nicely, much to my relief and delight. Maybe give it a try, and once you got the rising bit down, work on other recipes from there?

If they are not working even though you are following them to a T, perhaps temperature is your issue - is the water too cold or hot for the yeast? Are you leaving the bread in a cold spot? I have a cool kitchen, so when my oven is pre-heating while rising I place the loaf above the stove to rise, as it receives ambient warmth from the heated oven.