Considering most of the RMC redos have zero-g rolls/barrel rolls of some sort, yes it can be done. However when it comes to Gwazi, the longer it rots in place the less I feel a RMC make-over is happening. After all every RMC make over's have been done on coasters that were operational until they closed for their redo. Not only is Gwazi SBNO, but one side has been closed longer then the full closure.
If something RMC related is happening, I see them flattening Gwazi compleately and just building a new RMC coaster from scratch. Though I also think a B&M hyper/giga is more likely a replacement.