DMR

I have a Pi-Star and a BTECH DMR 6x2 radio, mostly use it with a few talk groups and the quadnet array (XLX307). I would like to use it as a gateway/auxiliary station to allow me to control and do a sort of cross band repeater using an old radio shack 2m radio I have. My shack is in the Garage and I would love to talk on the analog repeater from the house but the HTs I have are just not enough power.