How exactly from the point of view of technology the gates and the gate are made, which is not known in the photo, but the result is excellent. With confidence we can only say that the master did it. Presumably, the outline of the painting was originally applied to metal sheets and then worked out with a punch.
Such a metalworking process as a punch allows you to create very interesting decorative things. In this case, the amount of work suggests the use of a hammer. The artist’s brush also worked hard here, judging by the harmoniously selected tones. The whole fence is not visible in the photo, but judging by the brick risers, gates with such a landscape are designed to visually compensate for the massiveness of the fence itself.