In a traditional quiche, the only ingredient that will contain gluten is the flour with which the pastry case is made. To make a gluten free version, purchase a bag of gluten free flour and use this for the pastry.
If you make the filling yourself (from pumpkin pulp, eggs, cream and spices, you can make sure that there is no gluten (gluten comes from flour) in it. If you purchase a mix to make it you will need to purchase a product which is sold as being gluten free. However, please note that the pastry case of the pie will have flour (and therefore gluten) in it unless you make the pastry out of a treated flour that is sold as being gluten free.
Too much gluten in the pastry causes the pastry to toughen. The end result of such a pastry would be a tougher pastry - less flake and tenderness. Prohibit the gluten formation by not using too much water. (water causes gluten to form) and in addition do not over work the pastry. The more the pastry is handled, the more gluten is formed, the tougher the pastry.
You can make ANYTHING gluten free. Just use gluten free products.
There is no way to make wheat gluten free.
Gluten-free cupcakes
YES
yes if you get a gluten free muffin mix
gluten
Bread flour has a higher percentage of gluten than all-purpose flour or pastry flour. Gluten is a protein molecule that forms a sort of network in dough that is desirable to make bread chewy. But pastry is suppose to be tender or flaky, not chewy or tough. So bread flour is not a good choice for making pastry.
Brew it from something that does not contain gluten - the simplest but messiest would be gluten-free flour.
The burger part has no gluten as long as there's no wheat in it. The bun is the problem; are there gluten free buns? You can use gluten free bread instead.