The calculated distance (air line) between Gümüşhacıköy and Kayseri is approximately 149 miles respectively 239 kilometers.
By car or train, the actual journey to Kayseri is certainly longer, as only the direct route (as the crow flies) between Gümüşhacıköy and Kayseri has been calculated here.
Air line (approximately)
239 kilometers
129 nautical miles