"I could use them as tomato stakes or gate posts."

It is used for heavy structural work, gate posts, and big beams.

Among its many features is "a stone fence with gate posts."

Soon he turned the car between great gate posts and stopped before his home.

How can I fix a gate post to a wall?

That actually is a a railway gate post unless they've changed it, which I don't think they have.

How can a gate post be fixed to a wall?

There was a gate post with a sign hanging off it, and you came round the back drive to the house.

Then he neared the pair of gate posts on his left.

The stone wall in front with central gate posts is also an original feature of the property.