The calculated distance (air line) between Zürich (Kreis 2) / Wollishofen and Zug is approximately 12 miles respectively 19 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 2) / Wollishofen and Zug has been calculated here.
Air line (approximately)
19 kilometers
10 nautical miles