The new school on Mill Lane is due to open in September 2022 and will have 75 spaces for children aged 11 to 16.
The school will mainly cater for children with social, emotional and mental health (SEMH) needs, but will also support children with autism and speech, language and communication needs.
The building is designed to include a variety of enhanced environmental measures, including solar panels on the roof of the school.
Cllr Philip Robinson, cabinet member for economy, education and skills, attended the official ground-breaking event on 22 July alongside Cllr Robert Vines, member for Brockworth, and Chris Spencer, director of children’s services.
Cllr Robinson said: “Our priority is to ensure every child has access to the high-quality of education they deserve, in a way that is suited to their needs.
“This new school will allow more young people to reach their full potential and allow them to access their education closer to home.”