Metasurfaces　based　on　geometric　phase　acquired　from　the　conversion　of　the　optical　spin　states　provide　a　robust　control　over　the　wavefront　of　light,　and　have　been　widely　employed　for　construction　of　various　types　of　functional　metasurface　devices.　However,　this　powerful　approach　cannot　be　readily　transferred　to　the　manipulation　of　acoustic　waves　because　acoustic　waves　do　not　possess　the　spin　degree　of　freedom.　Here,　we　propose　the　concept　of　acoustic　geometric-phase　meta-array　by　leveraging　the　conversion　of　orbital　angular　momentum　of　acoustic　waves,　where　well-defined　geometric-phases　can　be　attained　through　versatile　topological　charge　conversion　processes.　This　work　extends　the　concept　of　geometric-phase　metasurface　from　optics　to　acoustics,　and　provides　a　new　route　for　acoustic　wave　control.