I didn't realize that they live so long or that they mated for life. Some neat facts there. We're too far inland here outside of Atlanta to have any, but it's not a trip to the beach without seeing them. Just hearing their calls lets you know you are getting close! :)
Yes they can live quite awhile in the wild. Apparently there are different species of gulls and some do go inland but, like you, the ones I see are around the water.