All three VR Headsets (Oculus Rift, HTC Vive and Windows Mixed Reality) offer the full Gravity Sketch experience. However, due to user’s inclination there is more support for Oculus Rift and HTC Vive.
Furthermore, some of them are stronger depending intended usage of Gravity Sketch. If the intention is to spend hours on it while sitting on a desk, Oculus Rift design and set up are more comfortable for this purpose. However, if the intention is to use Gravity Sketch all around the room, then the better option is the HTC Vive due to its superior room-wide sensing capabilities. Note: Oculus also offers reliable room-wide sensing.