Kum & Go LC last week bought 1423 Grand Ave. in the Western Gateway for $1.7 million, The Des Moines Register reported. The property is home to a Subway restaurant and was owned by SK Inc. Kum & Go announced plans last month to build a new headquarters adjacent to the John and Mary Pappajohn Sculpture Park, and plans to buy the entire block between 14th and 15th streets and Grand and Ingersoll avenues.