The ornamental design for a gasketarrangement, as shown and described.
FIG. 1 is a top, right side perspective view of a gasket arrangement;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof; and,
FIG. 4 is a front view thereof, the left side view, right side view, and rear view being identical to the front view.
The long dash-short dash lines represent the bounds of the claimed design. The broken lines shown illustrate portions of the gasket arrangement that form no part of the claimed design.