Tuner reads that the string's pitch is in tune, but it sounds incredibly off...?

Question

I have been playing guitar for 9 years, but know just enough about repairs to get by. On one of my Ovation Celebrity Deluxes, my G string always sounds off. I don't think its an issue of tuning; I have multiple digital tuners, and they will all say that it is on pitch, but to my ear (as well as everyone else's) it sounds off. I've tried changing my strings many times, using different gauges, different brands, and even different string styles, all with no avail. Also of note, it doesn't seem to matter whether I am playing the string open or on any fret up and down the neck, it always just sounds off. Can anyone think of any possible issues? Please help, I used to love this guitar...

Answer 1

Can you change the tuning a bit so it sound good to you?
It might read to be a bit off then, but if it sounds good to you that would not hurt.
I have learned to tune my guitar using the lower string, 5th (?) fret to get the same note, you only tune one of the strings to an other instrument.
That way the guitar always sounds right in your ears.

Sorry about replying so late, I missed this question completely.