You sure we're talking about the same "goo gone"? The stuff I'm talking about, and have used successfully many times without hurting the finish on cars and bikes, is strictly citrus based. I guess if you left it on the finish for an extended time it might hurt it, but as with any kind of cleaner/solvent you typically rinse it off immediately.
When I lived in Oregon my driveway was almost totally sheltered by a huge pine tree, which constantly left not just small specks of sap, but lots of large (nickel size) globs of sap on my car. I routinely used citra-solv and goo gone to remove the sap and neither ever hurt the finish in the slightest.