 | Visit the GIS Medical & Surgical Supplies showroom in Gaithersburg, Maryland today for a wide-ranging selection of medical supplies, where you will find a professional, respectful shopping experience. |  | GIS Medical & Surgical Supplies 501 North Frederick Ave Suite #107 Gaithersburg, MD 20877 (Kaiser Premenante Building.) | |  | Nursing Home Residents Receive a 5% Discount!  Monday - Friday 10 a.m. - 6 p.m. Saturday - Closed. | | |