1. Preheat oven to 375°.
2. To prepare biscuits, weigh or lightly spoon flours into dry measuring cups; level with a knife. Combine flours, granulated sugar, baking powder, xanthan gum, and salt in a large bowl, stirring with a whisk; cut in butter with a pastry blender or 2 knives until mixture resembles coarse meal. Add 1 cup half-and-half; toss with a fork until moist. Stir in strawberries and almonds.
3. Drop dough by tablespoons 2 inches apart onto baking sheets lined with parchment paper. Brush tops of dough with extra half-and-half. Bake at 375° for 20 minutes or until edges are golden brown. Remove biscuits from baking sheet to a wire rack; cool 20 minutes.
4. To prepare glaze, combine powdered sugar, 1 tablespoon half-and-half, and almond extract in a small bowl, stirring until smooth. Drizzle glaze evenly over cooled biscuits.