[2] Gergana entered the starting five of the national senior group in 2021, debuting at the World Championships in Kitakyushu along Camilla Feeley, Isabella Ivanova, Nicole Khoma, Karolina Saverino, Emily Wilson.

[5] In June she took part in the World Cup in Pesaro taking 13th place in the All-Around, 11th with 5 hoops and 13th with 3 ribbons and 2 balls.

[6] Petkova represented the USA at the Pan American Gymnastics Championships with Maria Bolkhovitinova, Katrine Sakhnov, Karolina Saverino, Hana Starkman, Emily Wilson, winning bronze in the All-Around as well as the two event finals.

[7][8] In late August she competed at the World Cup in Cluj-Napoca where the group was 12th in the All-Around, 14th with 5 hoops and 12th with 3 ribbons and 2 balls.

[9] In September Gergana attended the World Championships in Sofia along Katrine Sakhnov, Karolina Saverino, Hana Starkman, Emily Wilson, they took 15th place in the All-Around and with 5 hoops, 16th with 3 ribbons and 2 balls.