If the file is traditional language driven APT, with geometry definition (L1=LINE...) and motion commands (GOLFT...), then no, you need an APT system.
If it is a CLS format, (GOTO/x,y,z,i,j,k...) then yes, you can import this as a CLS file in to NX CAM, and postprocess it using NX/Post.
Mark Rief
NX CAM Customer Success
Siemens PLM Software