This kind of GBR is like a rifle. Fortunately it is 3.8BLY distant so the radiation reaching Earth is negligible.
Now if a supergiant star in our own galaxy did this, we'd be in heap trouble. But a supernova only happens every 400 years or so (and a GBR event is even rarer). The odds of the axial jet being aimed right at us is probably a 1-to-1000 shot. It in words, don't worry about it.
The bang will still be pretty specactular. 
Astronmers think that Eta Carinae (above) could go supernova at any time. It is rather close (7500LY) -- you will probably be able to see the explosion in the daytime. The axis isn't pointing in our direction, fortunately.
Makes me think of the old war protest song from the 60s...
Well it’s one two three what are we fighting for?
Don’t ask me I don’t give a damn,
Next stop is Viet Nam.
And it’s 5, 6, 7 open up the Pearly Gates
No time to wonder why
WHOOPEE we’re all gonna die.
I know I will die someday. We are never promised tomorrow. We all die eventually. So hug your kids, and your spouse, today, and tell them you love them.
For one thing, it really freaks them out! LOL