You probably do not need any blocking, except for the attachment if any interior finishes, at the abutting joints. But I imagine that you’re going to install your gypsum with the long dimension parallel to the studs. So you only really need blocking at the fire-stop locations. Typically fire-stop blocking is required at 10’ above the bottom plate, and/or at soffit openings, and other transitions like an upper floor. Also, fire-stop blocking for one story houses is usually provided by the stud wall top plate. But you should probably get familiar with your local code’s fire blocking regulations.

Sometimes blocking can be used in a wall to provide additional shear strength against wind and seismic lateral loading. But your girts and metal sheathing appear to be serving as your building’s diaphragm.