AutoCAD 2013 :: Import Blocks With Correct Geographical Information

I wish to import from a TOPCON file. The points are from a GPS unit and are in standard form (easting, northing and elevation). I have been able in import the points into AutoCAD, and although they are in the correct location relative to each other, their geographical information has been altered (ie, the old coordinates are lost, and any measurements between points are now completely inaccurate).

I am working in metric units, and I think the problem may be that when I import the block, it comes in with 'block units' in inches. I cannot see how to change this. I also cannot select 'locate using geographical information' when I insert the block, which I think may be important in preserving geographical information.