Take a look at the
gsqlcmd[
^] command line utility.
For example, you may export data as text, csv, or htm:
gsqlcmd sql "EXEC dbo.sp_MyProcedure" output.txt
gsqlcmd sql "EXEC dbo.sp_MyProcedure" output.csv
gsqlcmd sql "EXEC dbo.sp_MyProcedure" output.htm
where sql is a name of the target connection.