Hello bojunk,
Very interesting question.
While theoretically, the rationale that switching domiciles might give some relaxation on the GMAT requirement sounds fair, from a practical standpoint the admissions committee will be able to figure out that the switch happened only recently and most of your academic career to date was in your previous domicile.
Ideally, you should try distinguishing yourself based on what are you bringing to the table in terms of personality traits, experiences, values/principles, maturity, etc. besides the obvious tangible component - GMAT/GRE scores. As someone who has guided hundreds of applicants like yours, I would say focus on getting the best GMAT score possible and showcasing the most impactful version of yours in the applications while considering the nationality change only as a bonus.
Happy to help you in this admissions journey and make it memorable. You can reach out to me at
arijit.biswas@crackadmission.com Cheers and Best of Luck