Sharonov,
I have trigeminal symptoms too, but I am fortunate that they are completely different than the ones you are experiencing. It is only mild numbness (i.e. hypoethesia), which is not bothersome at all. Other than that, I didn't have any other symptoms. Hence, in deciding to go with GK, I took into account the fact that I was basically symptom free, and wanted to remain that way. And indeed this has happened, but of course as I expected the numbess is still there, since the tumor is still pressing on the trigeminal nerve.
Having said this, I agree with Adrienne that I don't see how severe trigeminal nerve pain can be relieved with radiation, since the trigger for the pain will remain there. Small ANs typically do not affect the trigeminal nerve, but as the tumor grows, it starts impinging on it at its root entry to the brain stem. This is probably what has happened to you, so I don't think it was pressing your nerve for years.
If you need relief, it seems like decompressing the nerve may be the only way to go.... Dubulking the tumor followed by radiation is an approach that some surgeons take. So make sure to bring these issues up on your next doctor's appointment.
Good luck
Marianna