GRE? - Graudate School - Psychology or MBA

I’m planning to apply for a graudate programme next year, but i’m thinking if i should choose a Psychology programme or an MBA. I guess i may apply for both programmes of different schools at the end. As most Psych programmes require GRE scores, while MBA programmes require GMAT scores in the application, which test (GRE or GMAT) is more likely to be accepted by both MBA and Psychology programmes? Is GMAT also accepted by most graduate programmes in Psych?

I’m planning to take the test after this fall. Your advice will be helpful as it will guide my agenda for the study now. Thank you very much.