Yes, you can make gluten-free crepes or waffles in crepe makers and waffle irons. To do so, you need to use gluten-free flour blends or specific gluten-free flours like almond flour, coconut flour, or rice flour. These flours can be substituted for regular wheat flour in crepe and waffle recipes. 
For gluten-free crepes, mix your chosen gluten-free flour with eggs, milk (or a non-dairy alternative), a pinch of salt, and a bit of oil or melted butter. Ensure the batter is smooth and slightly thinner than pancake batter. Let it rest for about 30 minutes to allow the flour to absorb the liquid, which helps improve texture. Preheat the crepe maker, lightly grease it, and pour a small amount of batter, spreading it thinly. Cook until the edges lift easily, then flip to cook the other side.
For gluten-free waffles, combine gluten-free flour with baking powder, sugar, salt, eggs, milk (or a non-dairy alternative), and melted butter or oil. The batter should be thicker than crepe batter. Preheat the waffle iron, lightly grease it, and pour in the batter, spreading it evenly. Cook until golden brown and crisp.
Both crepe makers and waffle irons work well with gluten-free batters, but it's important to ensure they are thoroughly cleaned to avoid cross-contamination if they have been used for gluten-containing recipes previously. Adjustments in liquid ratios might be necessary depending on the type of gluten-free flour used, as they absorb moisture differently. Experimenting with different flour blends can help achieve the desired texture and flavor.