Question on some old gear given to me. GTP4 and GNX4.

I used to own both a long time ago, but had been keeping up with recent upgrades. My question is am I able to use the hands free from the GNX4 with GTP4, I know I could with Sonar products, but like I said it's been a long time. Any help would be greatly appreciated, I have a spare laptop, but do not want to go through the process if hands free isn't an option, thanks!