I think that is a F-4 with a Lichtenstein FuG 202 B/C radar fitted.
I've done a little digging and changed this to an F-4. Mankau and Petrick note that the barrels of the MG 151/20 cannons, standard for this type, were covered in some propaganda photographs. I've checked some dates and I wouldn't expect such an early radar on a G series aircraft either.
Cheers
Steve