I claim the ornamental design for a baby pillow gripper, as shown and described.
FIG. 1 is a perspective view of the baby pillow gripper showing my new design;
FIG. 2 is a front view thereof;
FIG. 3 is a top view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a left side view thereof;
FIG. 6 is a rear view thereof;
FIG. 7 is a bottom view thereof; and,
FIG. 8 is a perspective view of the baby pillow gripper shown in a state of use.
The Broken lines shown in the drawings represent stitching and forms no part of the claimed design. The broken lines showing the baby bottle represent environmental subject matter and forms no part of the claimed design.