|Date of birth||31 January 1988|
|Place of birth||Amsterdam, Netherlands|
|Height||1.78 m (5 ft 10 in)|
|2009||→ RBC Roosendaal (loan)||15||(0)|
|* Senior club appearances and goals counted for the domestic league only and correct as of 15 March 2014.
† Appearances (Goals).
He spent the 2009-10 season on loan at RBC Roosendaal. The loan contract had an option to purchase the player, an option which RBC took advantage of on 11 June 2009. Nelson was released by RBC on 11 January 2010.
After six months without a club, he signed for CSKA Sofia in June 2010. In January 2012, he signed for Ukrainian club Metalurh Donetsk on a three-and-a-half year contract. On 11 March 2012, Nelson made his official debut for the team from Donetsk, playing the first 74 minutes of the 1:1 home draw with Metalist Kharkiv in a Ukrainian Premier League match.
- AZ-talent Gregory Nelson beste B-junior van - AZ Fanpage
- Toet, Van Driel en Nelson langer bij RBC R'daal
- Zimmerman en Nelson verlaten RBC Roosendaa
- "ЦСКА се подсили с играч на АЗ Алкмаар" (in Bulgarian). Gong.bg. 11 June 2010. Retrieved 11 Jun 2010.
- "Димитър Борисов: Зику и Нелсън са продадени, ЦСКА ще свива бюджета". Dnevnik.bg. 30 December 2011.
- Пресс-служба ФК «Металлург» (Донецк) (11 January 2012). "Грегори Нельсон – первый новобранец "Металлурга"" (in Russian). Metalurh Donetsk official website. Retrieved 12 January 2012.
- n/a (11 March 2012). "FC Metalurh Donetsk vs. FC Metalist Kharkiv Match Report" (in English). soccerway.com. Retrieved 16 March 2012.