Gallo is best known for his stint with Atalanta in the 1990's. The midfielder spent six years in Bergamo, making over 150 league appearances.
After retiring in 2009, Gallo returned to Atalanta to coach the youth team.
He left the role after three years in order to take charge of the first-team at Giacomense in 2012.
It was a year Gallo spent learning the craft of management.
Speaking in an exclusive interview with Tribalfootball.com, the Italian revealed he enjoyed the experience of learning from former Manchester City and Real Madrid boss Manuel Pellegrini at the London Stadium.
"Last year I made two study trips to London and I was lucky enough to follow the training sessions of Manuel Pellegrini's West Ham closely," he said.
"He has proved to be an excellent person and an exceptional coach. I saw many other games and I've taken inspiration from all the coaches both tactically and in the management of the group."
Gallo has Ternana competing well in Serie C Group C this season.
The Terni-based club are currently in fifth place, 14 points behind leaders Reggina.
And Gallo says he has aspirations to manage higher up the leagues and abroad.
"I work very hard every day to try to improve myself from every point of view, waiting for my big opportunity both in Italy and abroad."