I use this at home to keep my cats away from stuff. Only thing I’ve found that consistently works, they learn to avoid the thing even when empty. To use outdoors I’d recommend putting it in a little rain cover.
Lysol … the scented kind … and really soak the area up good … repeat after any rain storm.
Red pepper … sprinkle liberally and repeat after rain storms.
Dog … chain to post … requires love and affection.
Spade up a couple square yards of soil off in some isolated part of your property … cats do like to bury their scat.
Bark-a-mulch the area …
None of these are completely effective, but all together they can greatly reduce the problem … and these are fairly common household items that aren’t particularly dangerous to the cat in question.
I would recommend using a cat urine remover to destroy the urine already present at your gate. It may be just one cat, but this is usually a territorial behavior, and you want to do this to help remove your gate from the cat’s marking routine. Even when the scent is below the level you can detect it you can bet they still can.
By all means use the methods suggested above, but this is a pretty easy step to add to the process to help.
Actually sounds more like ‘marking’ than normal peeing. It’s done (mostly by un-neutered male) cats to mark their territory vs. other cats. Often it isn’t one cat, but 2 cats, each trying to mark over the others’ mark and reassert this as their territory. You’re probably on the edge, equidistant from both cats’ recognized territory.
Unfortunately, this harder to solve than just normal choosing to pee here. It’s a territorial thing. Best solutions are getting the cats comfortable with each other, so they are willing to share the territory – that’s pretty hard to do when they are not your cats and outdoors. Previous suggestions to make this a less desirable pee spot might help, possibly. But it’s not just chosen as a convenient pee spot – it’s a specific territorial marking. So minor annoyances like pepper & Lysol won’t do much to deter a cat that is defending its’ territory.
That hissing stuff is:
A. Clever, and a great way to keep cats away.
2. Absolute asshole method - it is like the "clever"cucumber meme - cats have an deep panic-inducing fear of snakes.
Kinda like pulling a gun on someone and firing than saying “Ha Ha! Just a Blank!”.
I was using an ultrasonic device to control neighbor’s asshole dog(s).
I tested one with kitty nearby. She looked at me with this “Why did you do that to ME?” look and ran.
She has since been exposed to another (nastier) ultrasonic bark stopper - it does not seem to bother her.
The snake imitation just might work against territorial males. Unless they see other cats (how does it trigger? Would a dog/kid/blowing trash deplete it?) triggering it and determine that the problem is a fake and develop ways to avoid triggering it.