Assemble the frame pieces with galvanized steel corner brackets.
How to build a wood fence gate with metal posts.
Metal posts last way longer sometimes decades than wood because don t rot or warp.
A third option is to use the following u bolt type hinge point mounted on the post.
Wood posts cost less than metal.
First construct a metal gate frame using thinner steel pipes than you used for the posts to reduce the weight of the gate.
The downside to building a fence with wood posts is that you ll likely need to replace the fence in 7 10 years.
Then use a lag bolt hinge pin screwed into the gate framing.
This style of wooden fence picket nests together to create a strong fence with little to zero visibility through the fence.
Alternatively you could drill a horizontal hole through the metal post and install the bolt type hinge pin to be mated with the type of bolt on hinge strap in the second following picture.