Damn, I missed this! See I´ve actually got a brand new Anakee2 front (110/80-19) at my house, that should fit a GS, too (or does the GSA have 21 inch front, I dont remember)... and I´ve even thought to sell it, because my current rear is soon finished, and next I´d want to try the new PilotRoad-3´s.
And the Michelin dealer in Helsinki would be:
Helsingin Pyora ja Mopo Oy
tel: 09-5479 9930
It is in Konala, right next to the road 120, and not far from Keha-1 (101).
If you´re still in need for a tyre, or need any other help, you can pm me, or send to my e-mail: pexa(at)mbnet.fi