Technically you can but with two cautions.  The first is the screws for all our wood gate brace kits that attach the brace to the gate itself are not self drilling.  They are intended for wood only.  You will need to pilot a hole 3/16" in diameter with a drill bit and drill for the screw to enter the vinyl material.  Second, you will need to be cautious not to over tighten the screws in the vinyl material.  Typically, a plastic compressible washer should be used when attaching hardware to vinyl gates.  We have a white colored True Latch vinyl version that is stunning, that will be available shortly.