Daily check of Global X airlines master tracking link against all aircraft flying under GXA call signs reveals a new addition to the fleet. N642VA must have been recently acquired from Alaska AiIrlines.
Updated fleet tracking link: https://globe.adsbexchange.com/?icao=a2e13a,a83f98,a2c4e0,a2bd72,a2d25e,a2d615,ab7437,a835d1,a2f9dd,a2f016,ad7274,a75013,a2c129,a4d4cc,a835d1,4844ab,a86e85
N285GX flying with call sign Camber call sign (CMB441) has landed at Gitmo. These are separate Global X flights for US Transporataion Command. And seem to happen every Saturday.
Last image is other US Transportation Command Flights. Not operated by Global X. Including one from Diego Garcia.