When you are in contact, inquire whether you can be given your FF number and set up with an online access to the FFP pages.
This way you could log into the GF FF site t check that you have been credited for each flight.

You should receive a bonus for joining onboard (if this is still going) and a first flight bonus. The miles are generous if you're in Biz or F.

The Gold or Silver package you will receive is large as the user guide is almost 2cm thick!