AFE20408: GaN LDMOS biasing with AFE20408

Part Number: AFE20408

Tool/software:

I was studying the IC AFE20408 and I found it suitable for my application. However, I can see that the Evaluation version has used NMOS FDC6305N for the VDD PAON switch. 
My application requires a drain current of at least 12A, so I just want to know which NMOS is suitable for this kind of application. 

Also, the number of configuration registers in AFE20408 is large. Is there any API, library or register map that I can refer to for writing code to drive this IC?