The calculated distance (air line) between Gimja Bēt Maryam and Gonder is approximately 127 miles respectively 205 kilometers.
By car or train, the actual journey to Gonder is certainly longer, as only the direct route (as the crow flies) between Gimja Bēt Maryam and Gonder has been calculated here.
Air line (approximately)
205 kilometers
110 nautical miles