The ornamental design for a guitarpickholder, as shown and described.
FIG. 1 is a perspective view of a guitar pick holder according to the present invention.
FIG. 2 is a side elevation view of the guitar pick holder illustrated in FIG. 1.
FIG. 3 is a top plan view of the guitar pick holder illustrated in FIG. 1.
FIG. 4 is a bottom plan view of the guitar pick holder illustrated in FIG. 1.
FIG. 5 is a front elevation view of the guitar pick holder illustrated in FIG. 1; and,
FIG. 6 is a side view of the guitar pick holder illustrated in FIG. 1, shown in use.
The broken lines in FIG. 1, illustrating guitar picks, and in FIG. 6, illustrating a guitar and picks, show the design in use and form no part of the claimed design.