Gold Golem Places Blocks

It is about 3 blocks tall and 2 blocks wide. It has a solid hitbox that entities cannot fall through. It cannot walk on its own, so stationary if not moved by another entity. It can pick up items that fall on its head and will attempt to place the block if it can be placed, or drop the item. I am open to hearing about ideas on how a gold golem might be able to place it and where in vicinity of itself.

They could be found in the bottom of "bastions" in the overworld.

Made with 7 gold blocks in a 3x3 cube with pumpkin placed on top:
Top(1/4): | Top-Mid (2/4):  | Bottom-Mid (3/4):  | Bottom (4/4):
AAA        | AAA                 | AGA                      | AAA
APA        | AGA                 | GGG                     | AGA
AAA        | AAA                 | AGA                      | AAA

A=air
P=pumpkin
G=block of gold