Oh you lucky girl!! I love FWs!! It looks pretty good! The table looks great too and with a little bit of prep will be ready to be refinished.
I agree with Candace- I wouldn't use GBG or alcohol. Is the masking tape brittle? When puling on it to remove, it might also pull off some of the decal. I would first try putting a really damp cloth on the tape for a period of time. I would probably repeat doing that a few times hoping that the paper tape and adhesive will soften and loosen up.
Great find!!