As a Nigerian, Greg does not have any record that he has been capped in any match for both junior or senior Nigeria National Football Team. In early 2010, Greg was rumored that he will soon play for the Indonesia national football team, though this rumor wasn't confirmed by Greg himself, what is interesting is that he does not confirm nor deny the rumor. After many speculations, in August 2011 Football Association of Indonesia finally confirmed that Greg has been naturalized, and got Indonesian citizenship officially on October 10, 2011.[11] He will be a part of the Indonesia national football team in the 2014 FIFA World Cup qualification campaign.