Gkiouzelis played with the youth system program of the Greek powerhouse Panathinaikos, before starting his pro career in 2014.
From 2012 to 2017, Gkiouzelis played in the lower level leagues in Greece, before joining Koroivos Amaliadas of the Greek 2nd division.
In 2020, Gkiouzelis joined Iraklis, of Greece's top-tier level Greek Basket League.
[2] In 23 domestic Greek league games, he averaged 5 points and 3.3 rebounds, while playing around 18 minutes per contest.
In 14 domestic Greek league games with Karditsa, Gkiouzelis averaged 5.1 points and 2.8 rebounds in 20 minutes per contest.