GPS tracking is useful for high-flying rockets, but you don't need to fly high for L3, just an M motor. So, you can fly a heavy rocket on a baby M and keep it low. In fact, a lot of people recommend keeping the flight simple to get the cert out of the way.
For example, I used a full "M" (AT M1939), but otherwise flew a
very conventional 3FNC for my cert. It went only 13,000' so was easily recovered without a GPS.
That said, the
TeleMetrum is a very nice unit with dual deployment and GPS tracking. The nice thing about an integrated package is that the telemetry includes the flight computer state, not just the position.