Boris Gaza studied percussion at the Timişoara Folk High School of the Arts and graduated from the Academy of Music and Theatre of the Timişoara West University and from the Ernst Busch University in Berlin with a degree in acting.

From 1993 to 2000 he appeared in numerous performances of the Timisoara State German Theatre, for which the directors Victor Ioan Frunză, Nikolaus Wolcz and Ștefan Darida, among others, were responsible. He has been a member of the GSTT ensemble since 2000 and was also the coordinator of the artistic staff from 2007 to 2021. In recent years, he has appeared, among others, in the performances of "Leonce and Lena" by Georg Büchner (directed by Niky Wolcz), "The Jungle Book" (directed and choreographed by Răzvan Mazilu), "A Midsummer Night's Dream" based on the work of William Shakespeare (directed by Kristóf Szabó) and in "Lysistrata 3.0" based on the work of Aristophanes (directed by Niky Wolcz). 

He regularly participates in theater festivals at home and abroad. Awards: in 2011/2012 he received the Grand Jury Prize at the Utah Arts Festival (USA) for the film production "The Crossing" (directed by C. Plesh), and for the same production also the Silver Award at the California Film Awards, as well as six awards at the Los Angeles Cinema Festival of Hollywood, including the award for Best Actor in a Leading Role. Since 2009, he has repeatedly participated in filming for various film projects in Romania and Germany.