Ku qor sii wadida cutubkan - Gasior wuxuu u tartamay kooxda Poland laba tartan oo dabaasha ah ciyaarihii Olombikada Xagaaga ee 2008 ee Beijing. Wuxuu ku tartamayay waqtigii lixaad ee loo qoondeeyay 1:48.52 isagoo imanaya siddeeddii ugu sareysay si uu hoos ugu dhaco heerka FINA B (1:48.72) laba meelood oo tobnaad ilbiriqsi (0.2) ee Horyaalka Yurub
shantii bilood ee la soo dhaafay Eindhoven, Netherlands. 200 m oo qaab xor ah, Gasior wuxuu garoonka ku dhammeystirey kaalinta siddeedaad ee ugu dambeysay sideed kulan oo uu ku guuleystay 1:49.25, isaga oo ka dambeeyay horyaalkii ugu dambeeyay ee Olombikada Michael Phelps ee Mareykanka iyo kaalinta labaad Park Tae-hwan ee Koonfurta ku dhawaad afar ilbiriqsi, wuxuuna ka maqnaa semi-finalka isagoo dhammeystirey meel soddon iyo afar meelood oo ka mid ah prelims. Gasior wuxuu sidoo kale la midoobay Łukasz Wójt, Michał Rokicki, iyo Przemysław Stańczyk ee 4 × 200 m dabaqa xorta ah. Dabaasha hore, Gasior wuxuu duubay kala qaybsanaanta 1:48.40, kooxda reer Poland waxay sii wadeen inay dhammeeyaan kuleylka labaad kaalinta toddobaad iyo afaraad guud ahaan iyadoo waqtiga ugu dambeeya uu ahaa 7:18.09.