I think I see where you are coming from, unfortunately the G510 or any G series cannot emulate joystick buttons as in Direct Input Button emulation (joystick buttons). Somebody may have made a program to do this but I haven't found it yet. They can only be programmed with keys or macros. What you need to do is open the Logitech profiler software, create a profile for CoD and set the key functions you need. For example set the G1key to to G...for gear, set the G2key to A for AI control, G3 to B for brakes etc. and so on for all your functions in the game you need. The idea is that you have the convenience of having all of your most used keys in a small compact area and not having to hunt all over the keyboard for them all the time.
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