the link JDiver provided is useful. You could also try:
https://en.wikipedia.org/wiki/Licenc...d_destinations
other sites that would require a little effort:
http://www.flightstats.com/go/Flight...ortQueryType=1
and
https://www.skyscanner.com/flights-t...a-airport.html
the GAP webpage does have a search option but its not very useful as it only shows flights scheduled the day of the search - it wont show upcoming dates.
https://www.aeropuertosgap.com.mx/en...lo&Itemid=1014