  We consider a Kaluza-Klein vacuum solution which is closely related to the
Gross-Perry-Sorkin (GPS) magnetic monopole. The solution can be obtained from
the Euclidean Taub-NUT solution with an extra compact fifth spatial dimension
within the formalism of Kaluza-Klein reduction. We study its physical
properties as appearing in $(3+1)$ spacetime dimensions, which turns out to be
a static magnetic monopole. We then boost the GPS magnetic monopole along the
extra dimension, and perform the Kaluza-Klein reduction. The resulting
four-dimensional spacetime is a rotating stationary system, with both electric
and magnetic fields. In fact, after the boost the magnetic monopole turns into
a string connected to a dyon.
