He is on the books of Kambaniakos and wears shirt number 6. His main role on the pitch is Defender. His estimated market valuation currently stands at 100K .

His latest transfer saw him join Kambaniakos from Agrotikos Asteras via on 2022-10-20.

Across the Greek Super League 2 2025-2026, G. Papakonstantinou appeared in 19 matches and averaged 0 tackles, 0 interceptions, 0 clearances, and 0 blocked shots per game.