Repeater for xtra talk radio (midland gxt 850)

I would like to know if there is a walk around to make a make repeater for xtra talk radio like midland gxt 850?
I have 7 radios midland gxt 850 I would like to boost their range. I do not know if I should think about getting a repeater because it seem like they transmit and receive on the same frequencies.
If there is a walk around I would be happy to hear about it. Thanks everyone