Sorry boys, but reading between the lines it sounds like he wants to go.
All he had to say was "I am happy at Sunderland and do not have any intention of leaving" and the subject is closed.
However, playing football is his job and he is not going to close the door on a move to a club who, at the moment, can offer him a step up in his career. No offense, but they can offer European football, challenging for top 4 and domestic cups, and most foreign players see London and Manchester as the places to be. (Yes currently Spurs would be seen as a step up from us too)
Loyalty doesn't really come into it because he has only played for you for a year and has seen Mensah and Muntari leave.
Now is the time for Steve Bruce to stand firm and refuse to let Gyan leave, but unfortunately he has not done this with other players in the recent past. Yes it looked like you got good money for Bent, but then a matter of weeks later Carroll was sold for £35 Million.
You could well be starting the season with Crouch, Keane N'Gog and Campbell as your strike force.