Kammala jumla mai zuwa: Gelael ya sami kwarewarsa ta farko ta injunan Formula One da ke tuka Toro Rosso STR12 a gwajin lokacin bayan Babban Prix na Bahrain na 2017, yana kammala zagaye 78. Ya ci gaba da tuki don Toro Rosso a matsayin gwajin gwaji a duk tsawon kakar, gami da gwaje-gwaje a Hungaroring da Yas Marina Circuit da kuma fitowar atisayen Juma'a a
Singapore, Malaysia, Amurka da kuma Mexico. Ya ci gaba da haɗin gwiwa tare da Toro Rosso a lokacin kakar, yana bayyana a ranakun gwaji a Spain, Hungary da Abu Dhabi, kuma a zaman atisayen Juma'a na. A cikin 2019, Gelael ya sake shiga cikin gwajin taya na bayan kakar wasa don Toro Rosso a Abu Dhabi.