Gymnasium Casteldeltese 1917

Gymnasium Casteldeltese 1917, commonly known as Gymnasium, is a Lammarese sports club based in Casteldelta, in the state of Nuova Maraglia. It is part of the Società Ginnastica Aitante Casteldelta, which is present in football, water sports, basketball and baseball. Founded in 1917, its soccer section has won 9 L1.League titles and 3 national cups.

Their traditional rivals are Audax Castelletto F.C., US Stemburghese and co-citizens DeltaForloni.

1947-1961
In 1947, the gymnastic societies "Ruggero Alonzi" and "Ferruccio Forloni" temporarily merged, forming "Società Ginnastica Unita di Casteldelta". In 1961, however, "Ferruccio Forloni" split from the SGUC, later forming DeltaForloni; to mark the end of the partnership, FC Casteldeltese 1917 was renamed AC DeltAlonzi.