| Season | Team | Competition | MP | G | A | Rating | ||
|---|---|---|---|---|---|---|---|---|
| 2022/2023 | Faroe Islands | UEFA Nations League | 4 | 0 | 0 | 0 | 0 | 6.3 |
| 2022 | Faroe Islands | Friendly International | 2 | 0 | 0 | 0 | 0 | – |
| 2022 | Faroe Islands | World Cup - Qualification | 5 | 0 | 0 | 0 | 0 | – |
| 2020/2021 | Faroe Islands | UEFA Nations League | 1 | 0 | 0 | 0 | 0 | 6.9 |
| 2020 | Faroe Islands | Friendly International | 1 | 0 | 0 | 0 | 0 | – |
| 2020 | Faroe Islands | Euro - Qualification | 8 | 0 | 0 | 0 | 0 | 6.4 |
| 2018/2019 | Faroe Islands | UEFA Nations League | 6 | 0 | 0 | 1 | 0 | – |
| 2018 | Faroe Islands | World Cup - Qualification | 10 | 0 | 0 | 0 | 0 | – |
| 2016 | Faroe Islands | Euro - Qualification | 10 | 0 | 0 | 0 | 0 | – |
| 2014 | Faroe Islands | World Cup - Qualification | 5 | 0 | 0 | 0 | 0 | – |
| 2013 | Faroe Islands | Friendly International | 1 | 0 | 0 | 0 | 0 | – |
| 2012 | Faroe Islands | Euro - Qualification | 2 | 0 | 0 | 1 | 0 | – |
| Total | 55 | 0 | 0 | 2 | 0 | – | ||
| Date | From | To | Type | |
|---|---|---|---|---|
| - | Hafnarfjordur | HB Torshavn | ||
| 01 Jan 2016 | Stjarnan | Hafnarfjordur | Free agent | |
| 04 Apr 2015 | Motherwell | Stjarnan | ||
| 07 Feb 2013 | Silkeborg | Motherwell | Free agent | |
| 04 Apr 2013 | Manchester City | Silkeborg | ||
| 01 Jan 2011 | Tranmere | Manchester City | Return from loan | |
| - | Manchester City | Tranmere | Loan | |
| 05 Jan 2009 | Wrexham | Manchester City | Return from loan | |
| 03 Jan 2009 | Manchester City | Wrexham | Loan | |
| 01 Jan 2009 | Blackburn | Manchester City | Free agent | |
| - | Motherwell | Blackburn | Return from loan | |
| 08 Aug 2008 | Blackburn | Motherwell | Loan | |
| 07 Feb 2007 | BK Frem | Blackburn | ||
| 07 Jan 2004 | HB Torshavn | BK Frem | Free agent |
G. Nielsen career history shows progression across clubs and competitions, including club timeline, national team appearances and overall career totals.