Gnarly

Gnats or fruit flies? Gnats could be coming from a drain inside the house. Fruit flies origins are inside too. I'd leave out a bowl of apple cider vinegar and see how many show up. If you put it in a container with a cover, you can capture them by covering the bowl quickly and simply letting them go outside.

I have had them lately both inside and out. Or maybe inside is fruit flies. Gnats bite me and leave welts, even when I spray a repellent spray.

Do what @Vikingswest1 said. I know nothing about gnats.

I suppose we have gnats here but we never seem to have any problems with them. We get wasps from time to time that make a nuisance of themselves.

We are advised to destroy their breeding grounds.

Gnats usually come from the drain. We get them every year in the bathroom drain. You could spray for them.

No, maybe you have to spray your screen though. This year they don't seem to be a problem but some years they are bad here too, and come in through the screen.

Lots of gnats found in my bathroom maybe they suck water and lay eggs there.

I saw that you got tips already here. I have no idea as to how to get rid of them

Gnats are really very filthy insects. You can try out some mosquito spray to eliminate.

you can make a trap. put a bit of fruit or veggie in a cup, cover it with plastic wrap, poke tiny holes with pen or pencil I did about 3 I think. They can go in but not come out.

This might help

We had a random problem with them a few years ago. Hate them

@AmbiePam Do you have screens on the windows and the door open with no screen? Maybe get something to cover the windows and door if don't have so can open it to get air in so they will not come in.

Bug spray on yourself?

Neem solution might help.