The antenna matters as much, if not more than the radio - so the KG-1000G MIGHT get you to the repeater with the right antenna.. and your HT MIGHT also..
It is also possible that from your home NEITHER will hit the repeater - because what is between you and the repeater is the most important factor.. If there is a mountain, a forrest, hills, etc, then you will never hit it.
Zello is a voice-chat app that some people use to connect repeaters to, allowing you to talk on a repeater from your phone, using the Zello app. You can read (a lot) more about it here on the this webpage explaining how to use Zello with my repeater: https://www.notarubicon.com/zello-gmrs-repeater/