First construct a metal gate frame using thinner steel pipes than you used for the posts to reduce the weight of the gate.
How to build a wood fence gate with metal posts.
When using the fencetrac system to build a wood fence with metal posts we recommend using tongue and groove red cedar fence pickets.
Metal posts last way longer sometimes decades than wood because don t rot or warp.
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.
A third option is to use the following u bolt type hinge point mounted on the post.
Hang the gate frame to the post hinges then drill holes through the top and bottom rail of the frame and attach wooden rails with carriage bolts.
Assemble the frame pieces with galvanized steel corner brackets.
Then use a lag bolt hinge pin screwed into the gate framing.
Wood posts cost less than metal.