Three days after playing in the Olympic final, on 15 August 2012, Gabriel made his senior debut for Brazil, featuring as a starter in a 3–0 friendly win over Sweden, having the distinction of playing his first professional match at full international level.
Tiga hari setelah bermain di final Olimpiade, pada 15 Agustus 2012, Gabriel membuat debut seniornya untuk Brasil, menampilkan diri sebagai starter dalam kemenangan ramah 3-0 atas Swedia memiliki perbedaan memainkan pertandingan profesional pertamanya di tingkat internasional penuh..