Gazebo has different styles and shapes. Rectangular, square, oval, octagon, fit to size or if not, sure we could give some recommendations. Deck and floor might or may not rest on existing deck/ patio, poured concrete slab, raised deck with lattice, raised solid deck or other material and this will be evaluated or identified during planning stages.
Gazebos are typically made of traditional square picket walls, solid walls, skylight, bench(es), swing, bar, paint, screens, door, glass windows, ceiling fan, electricity, plumbing, other, stereo, tv, cable, etc.