  We study semiorthogonal decompositions of bounded derived categories of
gentle algebras and how they are manifested in the geometric model of these
categories as constructed by Opper, Plamondon and Schroll. We prove that there
is a one-to-one correspondence between such semiorthogonal decompositions and
suitable cuts of the marked surface underlying the geometric model. Our main
tool is the characterization of basis morphisms between indecomposable objects
due to Arnesen, Laking and Pauksztello.
