In February 2014, she was called for the first time by the Royal Spanish Gymnastics Federation, attending several controls and concentrations held at the CAR in Madrid during the year.

[5] In September 2014, Gayán was awarded a scholarship by the Royal Spanish Gymnastics Federation to be part of the national junior group, going on to train under the command of Ana María Pelaz at the CAR in Madrid.

[6] In February 2015, the junior team debuted in competition at the Miss Valentine International Tournament held in Tartu, Estonia, where they achieved 4th position in the All-Around and 7th in the apparatus final with 5 balls.

[7] At the end of March, the junior team competed in the International Tournament in Lisbon, Portugal, where they again achieved 4th place in the All-Around in addition to winning the bronze medal in the apparatus final.

On July 23, 2016, Gayán made two exhibitions with the junior Spanish ensemble at the 20th Anniversary Gala of the gold medal in Atlanta '96, held in Badajoz.

[20] The team in that competition was made up of Ana, Mónica Alonso, Victoria Cuadrillero, Clara Esquerdo, Lía Rovira and Sara Salarrullana.

From the Guadalajara World Cup the Spanish team was made up of Ana, Mónica Alonso, Victoria Cuadrillero, Clara Esquerdo, Alba Polo and Lía Rovira.

[36] The team was formed in this championship by Gayán, Mónica Alonso, Victoria Cuadrillero, Clara Esquerdo, Alba Polo and Sara Salarrullana.

[41] The team was formed in this championship by Ana, Victoria Cuadrillero, Clara Esquerdo, Alba Polo, Emma Reyes and Sara Salarrullana.

[42] In September 2020, after the previous team didn't meet the expectations set on them, including not qualifying for the 2020 Olympics before, Alejandra Quereda announced a control to create a new group.

[45] In October Ana participated in the World Championships along with Ines Bergua, Valeria Márquez, Mireia Martínez, Uma Mendez and Patricia Pérez, In 2021 Ana participated in the World Championships along Inés Bergua, Valeria Marquéz, Patricia Pérez, Uma Mendez and Mireia Martínez, finishing 12th in the All-Around and 5th in the 3 hoops + 4 clubs' final.