Take a look at Section 8.4.1.1.2 GPS port (RJ11) of the V7 manual. In the V2.02 manual this is on page 35.

This section shows the pinout arrangement for the GPS port on the back of the V7.

The port is capable of sending 12 V out to power the GPS and send data to the GPS and receive data from the GPS. Below is the table copied from the manual:
Pin number Description
1 (output) 12V DC, to supply GPS
2,3 N.C.
4 (input) Receive to LXNAV V7 RS232 (e.g.NANO power 232)
5 (output) Transmit from LXNAV V7 RS232 (e.g.NANO power 232)
6 Ground

When you purchase the V7, a GPS cable is included in the package and if you specify that you are using the powerflarm, the correct cable will be delivered otherwise you will receive the default IGC cable.

The PDA cable is not included in the package, and for the Oudie 2, you will need to purchase the V7 Oudie cable.

Look at the cable table at the bottom of the V7 page on my website:

www.foxonecorp.com/index.php/lx-nav/v7-vario


This shows you some of the available connection and cable options for the V7.