Can these be used to build a side yard gate and construct side posts for the gate?

Hi there! Thank you for your interest in our products! We wouldn't have any specific recommendations for our decking to be used as a gate, making your project more custom. We do know customers have used our deck boards to create fences, with success, but we do not have any testing to be able to make any recommendations. One thing to note would be that our decking is one sided, so the coloring and grain pattern is only on the top of the boards, not on the bottom. We would love to connect with you further to discuss your project, and go over potential options. Please give us a call at 877.275.2935 if you have any questions or need assistance!