[2] Gouaned won a silver medal in the 800m Youth race at the 2019 African U18 and U20 Championships in Athletics held in Abidjan (Côte d'Ivoire) behind Abdo Razack Hassan from Djibouti setting in the process an Algerian Youth record in 800m with a time of 1:47:88.

[3] Gouaned also won a silver medal in the 800m at the Athletics at the 2018 Summer Youth Olympics held in Buenos Aires (Argentina) behind Tasew Yada of Ethiopia.

[5] He also set a national junior record (NJR) in 800m race with a time of 1:46:35 in Batna Meeting (Algeria) after finishing second to Djamel Sejati.

Later in May 2021, Gouaned won 800m race B at the 2021 Doha Diamond League meeting improving the NJR to 1:45.47 Gouaned won a gold medal at the 2021 Arab Athletics Championships held in Tunis (Tunisia) in the 800 m race with a time 1:46.67 ahead of Moroccan Oussama Nabil,[6] and won a silver medal in the 400 m race at the same championships setting in the process a personal best of 46.72 sec behind Taha Hussein Yaseen from Iraq.

On 22 August 2021 Gouaned finished second at the 2021 World Athletics U20 Championships in Nairobi second after Emmanuel Wanyonyi setting another Algerian junior record in 800 with a time of 1:44.45.