Rubuta ci gaba don wannan sakin layi - A 1991, an zabi Ghousha memba na Kwamitin Zartarwa na PLO, inda ya wakilci jam'iyyar. Kungiyar PPSF ta rabu a lokacin da ake tattaunawa
tsakanin Isra'ila da Palasdinawa ya fara ne a Madrid a 1991, tare da Ghawshah yana jagorantar bangaren da ya fi dacewa kuma ya dawo cikin yardar Arafat. PPSF na Ghawshah ya yarda da Yarjejeniyar Oslo kuma ya yi aiki a matsayin Ministan Kwadago a sakamakon Hukumar Kula da Lafiya ta Palasdinawa (PNA) daga 1994, amma ya yi murabus a 1998 don nuna rashin amincewa da "cin hanci da rashawa da kuma rashin dabarun Palasdinawa". Ya sanar da murabus dinsa a cikin wata wasika, yana korafin rashin daidaito a tsarin mulkin PNA, da kuma bayyanannun misalai na cin hanci da rashawa. Ya ci gaba da zama Minista ba tare da Fayil ba, amma daga 1999 ba shi da mukamin minista. Ya halarci tattaunawar Camp David na 2000 a matsayin mai ba da shawara ga Arafat, kuma ya sake dawowa a matsayin Ministan Urushalima, wanda aka sani da Daraktan Gidan Gabas, a cikin PNA tsakanin ƙarshen Oktoba 2002 da Afrilu 2003.