Little Navmap will handle your airport navigation.
It doesn’t auto zoom but it does pull the airport data from the game and therefore the gates are where the game thinks they are. 
SkyElite (payware) does the same but with autozoom which works most of the time.*
*I’ve noticed if I have loads of different SimConnect apps running that there may be update glitches with SkyElite and it doesn’t always auto-zoom but there is an update coming soon which I’m hoping improves performance.