On the squares functor and the Gaitsgory-Rozenblyum conjectures

In the seminal work of Gaitsgory and Rozenblyum on derived algebraic geometry, eight conjectures regarding the theory of $(\mathrm{\infty },2)$-categories are stated. This paper aims to clarify the status of these claims, and to provide a proof for the last remaining open one. Along the way, we demonstrate the universal property of the so-called squares functor, a construction that plays an important role in the $(\mathrm{\infty },2)$-categorical foundations of Gaitsgory-Rozenblyum.