The calculated distance (air line) between Château-Gontier and Paris 13 Gobelins is approximately 157 miles respectively 252 kilometers.
By car or train, the actual journey to Paris 13 Gobelins is certainly longer, as only the direct route (as the crow flies) between Château-Gontier and Paris 13 Gobelins has been calculated here.
Air line (approximately)
252 kilometers
136 nautical miles