Gyariajido is the fifth boss of Xevious 3D/G.
Gyariajido is a gunship with two smaller gunships. You must destroy the central gunship.
The battle starts when it flies in and splits into 3. Sometimes, the parts will come back together and shoot 2 lasers, then split again. You can destroy the 2 supporting ships, but the central ship is the highest priority.
A surprisingly similar ship appears in Fardraut Densetsu, in one of the images accompanying the story of how GAMP has made replicas.