Dundee Duo are set to sign before midnight tonight.
There had been a cat and mouse game between the two clubs all day and now a deal has been reached for Armstrong and it’s thought GMS will now follow
Ronny Deila is very keen on getting both in an settled for a heavy fixture list coming up.
If both make the move then they would be ineligible to play against Dundee Utd in the League cup final in March. But it would be a small sacrifice as they now will have the opportunity to win more medals at Celtic Park.
In other Celtic news Michael Duffy left Celtic Park earlier this evening and his move is expected to be announced in the coming hours.
Celtic have also put a bid in for Kilmarnock youngster Robbie Muirhead who is highly rated.