15 inch Macbook Pro with Retina Display-dual Gateway monitors I am currently running dual monitors from a Gateway desktop. I would love to upgrade to a MacBook Pro, but would like to keep my two monitors. Is there an (easy) way to dual monitor non-Apple monitors from a MacBook Pro?
Certainly. The Retina MacBook Pro has one HDMI output and two Thunderbolt ports, so you can run the internal display and three external monitors as long as you can accept HDMI on your third monitor (with or without an adapter/converter).

Any mini-DisplayPort adapter from Apple will work from Thunderbolt in addition to adapters labeled as Thunderbolt.