Landing Gear controls being weird

[Sokol1]

I "suspect" that you are trying landing in Bf 109 that have Neutral position in Landing Gear switch (like Hurricane, G.50...). Spit have only Up and Down.

The normal procedure is - when you go to landing in air start missions:

1st hit G - switch go to Neutral position (watch the levers in cockpit).
2nd hit G - switch go to Down position and landing start drop, when in low position you get green lights.

But, if you are fast ~200KM/H or above the gear dont drop/raise, or drop/raise very slowly.

Instead use G as toggle, map G to lower, and Alt+G (or whatever) to raise, this help in avoid some confusion with "toggle" command.

BTW - When take off, after wheels raise (red lights in Bf109, or green light turn off in Hurri) switch gear up command one more time, to leave switch in Neutral.
So when you go to land dont need hit G two times like in air start missions.

Sokol1