The calculated distance (air line) between Gignac-la-Nerthe and Grenoble is approximately 126 miles respectively 202 kilometers.
By car or train, the actual journey to Grenoble is certainly longer, as only the direct route (as the crow flies) between Gignac-la-Nerthe and Grenoble has been calculated here.
Air line (approximately)
202 kilometers
109 nautical miles