Rubuta ci gaba don wannan sakin layi - Gelael ya sami kwarewarsa ta farko ta injunan Formula One da ke tuka Toro Rosso STR12 a gwajin kakar bayan Babban Kyautar Bahrain ta 2017, inda ya 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 bayyanar da aka yi a ranar 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.