Gikiewicz was born in Olsztyn. In July 2008, he moved to Jagiellonia Białystok.[3] In August 2010, he was loaned to OKS 1945 Olsztyn on a one-year deal.[4] He returned to Jagiellonia Białystok half a year later.[5]
In January 2011, he joined Śląsk Wrocław on 4.5-year contract.[6]
In June 2018, Gikiewicz moved to Union Berlin signing a two-year contract. The transfer fee paid to Freiburg was reported as €200,000.[9] On 7 October 2018, Gikiewicz scored a 94th-minute equalizer against 1. FC Heidenheim in the 2. Bundesliga.[10]
On 1 July 2020, he signed with Bundesliga club FC Augsburg.
Over three weeks after his contract with Augsburg had expired, on 22 July 2023, Gikiewicz joined Turkish side Ankaragücü on a one-year deal with an option for another season.[11] On 1 February 2024, he left the club by mutual consent.[12]
On 13 February 2024, Gikiewicz returned to Poland to join Widzew Łódź until the end of the season, with an option to extend his deal for another year.[13] Brought in as a replacement for the injured Ivan Krajčírik who joined Widzew just a month prior, Gikiewicz enjoyed a good start to his stint. He recorded four clean sheets in 11 league games before having his deal extended for a further year on 10 May.[14]