| Season | Team | Competition | MP | G | A | Rating | ||
|---|---|---|---|---|---|---|---|---|
| 2023/2024 | Concordia Chiajna | Liga II | 9 | 0 | 0 | 0 | 0 | – |
| 2022/2023 | Concordia Chiajna | Liga II | 9 | 1 | 0 | 0 | 0 | – |
| 2022/2023 | Petrolul 52 | Liga I | 13 | 2 | 0 | 3 | 0 | – |
| 2021/2022 | Voluntari | Liga I | 35 | 1 | 0 | 12 | 0 | – |
| 2020/2021 | Voluntari | Liga I | 16 | 0 | 0 | 3 | 0 | – |
| 2020/2021 | Universitatea Cluj | Liga II | 9 | 1 | 0 | 0 | 0 | – |
| 2019/2020 | Astra | Liga I | 22 | 1 | 0 | 9 | 0 | – |
| 2018/2019 | Hapoel Haifa | Ligat Ha'al | 23 | 2 | 0 | 8 | 0 | – |
| 2017/2018 | Hapoel Haifa | Ligat Ha'al | 33 | 1 | 0 | 8 | 1 | – |
| 2016/2017 | FCSB | Liga I | 28 | 1 | 0 | 11 | 1 | – |
| 2015/2016 | FCSB | Liga I | 12 | 0 | 0 | 3 | 0 | – |
| 2015/2016 | Cardiff City | Championship | 0 | 0 | 0 | 0 | 0 | – |
| 2015/2016 | FCSB | Liga I | 0 | 0 | 0 | 0 | 0 | – |
| 2014/2015 | FCSB | Liga I | 10 | 0 | 0 | 3 | 0 | – |
| 2014/2015 | Watford | Championship | 7 | 0 | 0 | 2 | 0 | – |
| 2013/2014 | Doncaster Rovers | Championship | 14 | 0 | 0 | 2 | 0 | – |
| 2013/2014 | CFR Cluj | Liga I | 0 | 0 | 0 | 0 | 0 | – |
| 2013/2014 | West Bromwich Albion | Premier League | 0 | 0 | 0 | 0 | 0 | – |
| 2012/2013 | West Bromwich Albion | Premier League | 11 | 0 | 0 | 3 | 0 | – |
| 2011/2012 | West Bromwich Albion | Premier League | 8 | 0 | 0 | 1 | 0 | – |
| 2010/2011 | West Bromwich Albion | Premier League | 26 | 0 | 0 | 4 | 1 | – |
| 2009/2010 | West Bromwich Albion | Championship | 23 | 2 | 0 | 6 | 0 | – |
| 2009/2010 | Dinamo Bucureşti | Liga I | 12 | 2 | 0 | 5 | 1 | – |
| 2008/2009 | Dinamo Bucureşti | Liga I | 22 | 0 | 0 | 4 | 0 | – |
| 2007/2008 | Auxerre | Ligue 1 | 27 | 0 | 0 | 7 | 0 | – |
| 2006/2007 | Celta Vigo | La Liga | 29 | 0 | 0 | 11 | 0 | – |
| 2006 | Spartak Moscow | Premier League | 3 | 0 | 0 | 0 | 0 | – |
| 2005/2006 | Dinamo Bucureşti | Liga I | 14 | 1 | 0 | 0 | 0 | – |
| 2004/2005 | Dinamo Bucureşti | Liga I | 13 | 0 | 0 | 0 | 0 | – |
| 2003/2004 | Galatasaray | Süper Lig | 6 | 0 | 0 | 1 | 0 | – |
| Total | 434 | 15 | 0 | 106 | 4 | – | ||
| Date | From | To | Type | |
|---|---|---|---|---|
| - | Petrolul 52 | Concordia | Free | |
| - | Voluntari | Petrolul 52 | N/A | |
| 02 Jul 2021 | U Cluj | Voluntari | N/A | |
| - | Astra | U Cluj | Free | |
| 08 Mar 2019 | H Haifa | Astra | N/A | |
| 06 Dec 2017 | FCSB | H Haifa | Free | |
| 02 Mar 2016 | Cardiff | FCSB | Free | |
| - | FCSB | Cardiff | Free | |
| - | Watford | FCSB | Free | |
| 07 Jan 2014 | Doncaster | Watford | Free | |
| - | CFR | Doncaster | Free | |
| 10 Sept 2013 | West Bromwich | CFR | Free | |
| 08 Jan 2010 | Auxerre | West Bromwich | € 1M | |
| 01 Jan 2010 | Auxerre | West Bromwich | Loan | |
| 08 Jan 2008 | Auxerre | Dinamo | Loan | |
| 07 Jan 2007 | Spartak M | Auxerre | € 3M | |
| 07 Dec 2006 | Spartak M | Celta Vigo | Loan | |
| - | Dinamo | Spartak M | N/A | |
| 01 Jan 2004 | Galatasaray | Spartak M | € 3.5M | |
| 07 Jan 2003 | Dinamo | Galatasaray | € 2M |
G. Tamaș career history shows progression across clubs and competitions, including club timeline, national team appearances and overall career totals.