In this paper, we study non-weight modules over gap-p Virasoro algebras, including Whittaker modules, U (C L₀) -free modules and their tensor products. We establish necessary and sufficient conditions for universal Whittaker modules to be irreducible and study the structure of irreducible Whittaker modules. The U (C L₀) -free modules of rank 1 are classified and the irreducibility of such modules are determined. Moreover, the irreducibility of tensor products of U (C L₀) -free modules of rank 1 and irreducible restricted modules is also determined.
Xu et al. (Wed,) studied this question.