Large single swing gate design

[MonzaRacer]

IF my mental calcs are right add more triangular bracing on middle upright, as Jimmy said make sure the latch is carrying weight off the hinges when closed. I dont see any real issues UNLESS the metal is too weak and starts breaking at hinges.
Kind of curious on how your attached/braced at hinge connection point. Depending on weight of what your putting on it you might want to think about some sort of roller on that large of span, if it gets real heavy.
I swa one gate like that and the owner had the planks/boards farther out from hinge milled thinner thus creating same illusion of build but decreasing weight. Like his inner boards were like 1/2 to 3/4 thick and outer ones were closer to 1/4 to 3/8 thick. One carpenter I asked said it was an old trick that many gate builders used, Just spacing outside everyone saw even but let inside show thickness variation.