Fruit pear-shaped, bright yellow; flesh yellowish-white, turning purple-red on cooking, flavour sweeter than most. Tree small, very dense, originated in Portugal. -- http://www.agroforestry.co.uk/ansample.htmlGamboa is a small town in the Republic of Panama, and is also the name of a fruit in the quince family. -- Wikipedia
SSR DNA fingerprint at NCGR-Corvallis suggests that Gamboa is a synonym for the quince cultivar 'Portugal'. -- data from N. Bassil, 11/2009.