I haven't tried making a gluten-free version, but I think your best bet would be to try using an all-purpose gluten-free flour blend.
Use a good nonstick cooking surface and enough oil. Also give the pan a chance to heat before adding batter.
This is usually due to dated baking soda and/or powder. Test your baking soda by sprinkling a small amount in a glass of vinegar. Do the same for powder by sprinkling it in water. Both should fizz. If either doesn't, toss it and replace!
Enjoy your vegan pancakes with maple syrup and vegan butter!