Nice job RT. If you are going to continue a fence off the gate supports, then would suggest pipe or heavy tubing winged at 45 degrees off existing gate supports before leaving gate open for any period of time. Here in Texas the soils dry & move so much that it will lean in short order no matter how deep the support posts are set.
I built this gate entrance to where I live & there is a 2 7/8" pipe fence support structure covered by the brick veneer. I also tied the pipe supporting the gate hinges to the pipe on the other end of the gate with an underground pipe before pouring the concrete. This is in lieu of using an overhead header pipe. I make a living going to different farms & ranches doing vet work & have seen about every kind of gate/fence/corral construction, and I firmly believe you can't over engineer it here in Texas...du
