With Android 4.3 Jell Bean update, Galaxy Mega 6.3 will support Galaxy Gear smart watch
A leaked document shows that the Samsung Galaxy Mega 6.3 will receive the Android version 4.3 Operating System update on January 2014. This document mentions Galaxy Gear smart watch compatibility for Samsung Galaxy S4, Samsung Galaxy S III, Samsung Galaxy S4 Mini, Samsung Galaxy Note 3, Samsung GALAXY Note II and Samsung Galaxy Mega.
But to support Samsung Galaxy Gear smartwatch, Galaxy Mega 6.3 should be updated to Android v4.3 OS first, where the document mentioned will occur in January 2014. So if you have a Samsung Galaxy Mega 6.3, it may not be too long before you will have the Galaxy Mega update to the Android v4.3 OS and can immediately support the connection to the Galaxy Gear.