You cannot directly open Google Maps in AutoCAD. Instead, you must capture geometry (roads, parcels, imagery) from Google Maps and convert it into CAD-readable vector or raster data.
Would you like a detailed video-like walkthrough for any specific step, such as georeferencing the image in AutoCAD? convert google maps to autocad
Use Google Earth Pro (free desktop app) to export high-resolution images and KML vector data, then convert in AutoCAD. You cannot directly open Google Maps in AutoCAD