it has been my experience that it is nearly impossible to get the newer antminers to solo mine since the new miners use stratum by default.
Antminers use cgminer, and cgminer certainly supports GBT.
Can you explain how to use CGminer from local desktop if antminer already have CGminer looaded by factory??? MY CGminer showing error ."CAN'T find USB connected device " .Well...how ANTMINER 5S can be USB connected if have only one port for ethernet???