The calculated distance (air line) between Zürich (Kreis 7) / Witikon and Zug is approximately 13 miles respectively 21 kilometers.
By car or train, the actual journey to Zug is certainly longer, as only the direct route (as the crow flies) between Zürich (Kreis 7) / Witikon and Zug has been calculated here.
Air line (approximately)
21 kilometers
12 nautical miles