Bestvina defined a $\mathcal{Z}$-structure on a group $G$ to generalize the theory of boundaries of CAT(0) and hyperbolic groups. In this talk, we will add to the known collection of groups admitting $\mathcal{Z}$-structures by showing that all generalized Baumslag-Solitar groups admit $\mathcal{Z}$-structures.

This is joint work with C. Guilbault (University of Wisconsin-Milwaukee) and C. Tirel (University of Wisconsin-Fox Valley).