GMAT vs GPA

I am a final year student at a Swedish University, studying an integrated master's degree in business and administration with a major in Finance. I have a solid GPA of 3.5, and I am looking for top Nordic B-schools for 2026. However, most B-schools in the nordic countries do not accept GMAT from other nordic students except SSE. Now my question is, is it worth just writing the GMAT without studying and scoring a 555-600 and just submitting that with my application or will that potentially lower my chances of admission? Because I will not have that much time to study for the GMAT since I am taking graduate courses at the moment.