Lie on your back. Bend both knees and place both feet on the ground hip width apart
Place Right ankle in front of the Left knee.
Wrap your hands around the back of your left thigh – right and through the opening in your legs, left hand to the left of your left leg (if flexible enough reach further and grab the left knee)
Gently pull your legs, as a single unit towards your body – this should provide a stretch to your right gluts
Keep your head and neck relaxed on the floor.
If comfortable with the stretch, release your Right hand and push Right knee forward while keeping the Left knee in the same place.