When using the new CT imported from the shapefile, it is already projected, there you will not need to run the "proc gproject" on it (unless you want some other projection, in which case you can use Jeff's suggestion to deproject and get the lat/long values, so you can re-project it using any projection you want).
Here is a simple example of importing the shapefile, and plotting the already-projected map:
proc mapimport datafile="/home/u59782200/data/CT_Planning_Regions/CT_Planning_Regions.shp" out=raw_ct;
run;
proc gmap data=raw_ct map=raw_ct;
id ObjectID;
choro planningRE;
Also, I notice that your title mentions maps.counties. Note that the 'maps' library is the old/legacy SAS maps (perhaps from 1996 vintage), and you'll probably want to use the latest 'mapsgfk' library instead (for your maps other than CT). Specifically mapsgfk.us_counties (the dataset label indicates this map is based on 2021 map data in the version of SAS I'm using).
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