NOMone Resolution Changer in the Play Store will do this for you.
I have, in the past, run at 1080p on the G3 for a small performance gain in games mostly. You may notice a fuzziness when doing this, but that's because it will no longer be 1:1 pixel ratio.
Make sure you adjust the DPI (in the app) to reflect the resolution you change to. I normally run 370-420 with 1080p. You can play with it.
You have to be rooted to do this.
You should always have a TWRP full nandroid backup ready to fall back to in case you cannot boot (if something goes wrong).
Have fun playing around with it!