Getting no power from gfci outlet line?

A GFCI outlet has a TEST and RESET switch. Press reset and see if it fixes problem. If reset won't stay in that means that a ground fault condition is present and may be on another outlet that is fed from the tripped GFCI.

If this isn't the problem check the main breaker feeding the GFCI and ensure it isn't tripped. If none of this works the GFCI itself may be bad.

If you have a Volt Meter you can remove the outlet from the wall receptacle and make sure there is voltage present. You can also see if there is a branch circuit connected. To troubleshoot you can disconnect the branch circuit and then try reset. If you have voltage on input and GFCI won't reset with branch circuits removed, replace the GFCI.