Preheat oven to 425°F (220°C).
In a saucepan, bring water and butter to a boil.
Add gluten-free flour, stirring vigorously until mixture forms a ball.
Remove from heat and let cool slightly.
Beat in eggs one at a time until smooth.
Drop by spoonfuls onto a baking sheet.
Bake for 20-25 minutes until golden brown.
Let cool completely.
Whip 2 cups heavy cream with powdered sugar and vanilla extract until stiff peaks form.
Slice éclairs in half and fill with whipped cream.
For ganache, heat ½ cup heavy cream until simmering, then pour over chocolate chips and stir until smooth.
Dip tops of éclairs in ganache.
Chill until set.