I claim the ornamental design of a gun housing, as shown and described.
FIG. 1 is a front, top perspective view of a gun housing showing my new design;
FIG. 2 is a front, bottom perspective view of the gun housing of FIG. 1;
FIG. 3 is a front elevated view of the gun housing of FIG. 1;
FIG. 4 is a rear elevated view of the gun housing of FIG. 1;
FIG. 5 is a left-side elevated view of the gun housing of FIG. 1;
FIG. 6 is a right-side elevated view of the gun housing of FIG. 1;
FIG. 7 is a top plan view of the gun housing of FIG. 1; and,
FIG. 8 is a bottom plan view of the gun housing of FIG. 1.
The broken lines consisting of dashes show an environment that forms no part of the claimed design. The broken lines consisting of a double-dot/dash pattern show a boundary of the claimed design.