But anyway, No its not possile becouse you need to jump on the tank and that is not ****ible for GDI (maybe on the flying maps)
And 2 the drive from one base to anoths is to long for the detonation to hit a building.
And most of the time when you try to deploy the beacon on the tank near the enemy base your likely to get shot or the tank is forced to move.

But i dont think it has been tested yet so...