The calculated distance (air line) between Gau-Algesheim and Nürnberg is approximately 141 miles respectively 227 kilometers.
By car or train, the actual journey to Nürnberg is certainly longer, as only the direct route (as the crow flies) between Gau-Algesheim and Nürnberg has been calculated here.
Air line (approximately)
227 kilometers
123 nautical miles