One of the best-known Polish Gypsy poets was Jerzy Ficowski (1942-2006).
Not quite right:
Jerzy Ficowski (October 4, 1924, Warsaw - May 9, 2006, Warsaw) was a Polish poet, writer and translator (from Yiddish, Russian and Romani). (Wikipedia)
He discovered and translated into Polish the poetry of Papusza, a Gypsy poetess, who was subsequently shunned and exiled by other Roma for "revealing secrets to the Gajos". But AFAIK, he was not of Romani extraction himself.