The 21-year-old has impressed at Groningen since his move from Willem II in 2011.
Reports claim the club want 4million euro (£3.4million) for Van Dijk, who is under contract until 2015.
While Nijland would not confirm the player would be going to the Scottish champions, he said he was set for a move abroad when a deal could be agreed.
He told vi.nl: "(He will go to) a foreign club.
"The bids and our wishes are not yet agreed.
"We would like to keep Virgil, but we understand his ambitions. It's an exciting time."