Would it be possible to implement that? Adding a text indication to the preferred parking for the livery you're flying.. Or just display the airline codes next to the gate Numbers if that would be too difficult?
Displaying the airline codes won't work very well, because that string can be up to 255 characters in length, and there's just not enough space on the menu, and it will look very bad too.
We'll have a look if it would be possible to just put some kind of flag, if the atc_airline_code of your own airplane matches the atc_airline_codes of the parking.
Of course, your own airplane MUST have an atc_airline_code to begin with...and that's not always the case, because is not a mandatory parameter, many 3rd party airplane developers just forget to add it, or put the livery name in the description, or the airplane title, which is not very realiable for matching, since it's not a code ( ex. different developers might use "Delta", "Delta Airlines" or "Delta Air Lines" ).