re: Posts for Backyard Gate

Will the posts end up being free standing all on their own, or fastened to something other than the gate (maybe the wall where it was before)? You can get bottom brackets (post bases) for posts that anchor in to the concrete, then the post in to that. You'd need a hammer drill (rentable usually) and masonry drill bits for concrete anchors.  What you'd get might depend on how heavy the gate is, or whether you could put a wheel on the swinging end of the gate to help reduce the leverage on the hinge post