After playing basketball at the Greek
amateur and
minor league levels with Filathlitikos, from 2008 to 2012, Gkikas started his
pro career in 2012, with
Filathlitikos in the
Greek 2nd Division. During the seasons that Gkikas played at Filathlitikos, he played with players such as
Giannis Antetokounmpo,
Thanasis Antetokounmpo,
Michalis Kamperidis, and
Christos Saloustros, during the club's peak years. During the 2012–13 season, Gkikas almost gained a league
promotion with Filathlitikos, but at the end of the season, the club finished in 3rd place in the Greek 2nd Division, just missing the league promotion to the Greek 1st Division. Gkikas moved to the
Greek 1st Division club
Aris, in 2013. During the two years he played at Aris, his numbers dropped, due to the limited playing time he had with the club. On 15 January 2015, after leaving Aris, Gkikas signed with the
Baltic League club
Ventspils. With Ventspils, he led the
2014–15 Baltic Baltic League in
assists per game, and was one of the key players of the team. He spent the
2015–16 season with the Greek club
Nea Kifissia. On July 17, 2016, Gkikas signed a two-year deal with the Greek club
Promitheas Patras. On June 19, 2017, after being one of the best players of Promitheas in the
2016–17 season, he renewed his contract with the club for two more years. He then became the
team captain. On July 4, 2019, Gkikas signed a three-year contract with
AEK Athens. In the 2020-2021 season, Gkikas averaged 6.9 points, 1.7 rebounds, and 2.5 assists, playing 17.4 minutes per contest. On August 6, 2021, Gkikas signed back with his former team
Promitheas Patras. In 22 league games, he averaged 7.2 points, 2.5 rebounds, 5.9 assists and 1.7 steals, playing around 24 minutes per contest. On June 21, 2022, playing against
Larisa for the
Greek Basket League playoffs, Gkikas achieved a career-high of 20 points and 13 assists. On June 28, 2022, Gkikas renewed his contract for another season. In 25 domestic league matches, he averaged 4.8 points, 2.6 rebounds and 2.7 assists, playing around 19 minutes per contest. On June 30, 2023, Gkikas signed with
Panionios in order to lead the club in its return to the professional divisions. Since then, he remains as the teams captain. ==National team career==