Objective
To evaluate the psychometric properties of the Brazilian version of the Global Psychotrauma Screen (GPS).

Methods
The scale was tested on two Internet-based samples: GPS-CCC (n = 657) and GPS-Brazil (n = 431). Exploratory factor analysis (EFA) was conducted on GPS-CCC. Confirmatory factor analysis (CFA), correlational analysis and sensitivity and specificity analysis were performed on the GPS-Brazil sample.

Results
EFA indicated a three-factor structure. Regarding CFA, models with one to three factors fitted the data well but the three-factor model proposed by Rossi et al. (2021) showed the best fit. Convergent validity was established between the GPS subscales and scales measuring symptoms of posttraumatic stress disorder (PTSD), complex PTSD, anxiety and depression. The cut-off point of 4 on the GPS PTSD scale was found to be optimal to identify probable PTSD.  Optimal cut-off scores for probable complex PTSD and significant symptoms of anxiety and depression were also identified.

Conclusions
The results show that the Brazilian version of the GPS is a valid tool to screen transdiagnostic posttraumatic reactions.