Blend the gluten free flour, cheese, butter, shortening and salt together using a pastry blender or two butter knives.
Slowly add the water just until the dough comes together.
Form into a disc and wrap in plastic wrap.
Refrigerate for an hour to chill.
Preheat oven to 375ºF.
Line a large baking sheet with parchment paper.
Working with half the dough at a time, on a pastry mat or floured surface, roll out the dough very thin (less than 1/8″)
Use a pizza cutter to cut into approximately 1″ squares.
Use a skewer or toothpick to put a hole in the center of each.
Transfer the crackers to prepared baking sheet leaving a little room between each cracker.
Bake for 15-20 minutes or until light brown at the edges.
Transfer to a cooling rack. The crackers crisp up as they cool.
Store in an airtight container.