Not back where it was. It was a 5 foot wide access to the new "way back," the backyard of the second house. There was a neighbor's low hanging fig tree that shaded it nicely and made it a great pretend cave or the inside of a rocket ship or submarine for us kids, but not much light for photos back there. The gas meter made a great part of the rocket engine or sub diving controls.
I had some great stuff I'd bought from the Rocklin Army-Navy Surplus yard, old control panels from planes, ships, etc. you could buy that stuff by the pound and it was great for a kid to make his own spaceship control room. Big knobs, switches, lights (I got some to even blink), great stuff. All the kids would come and we'd remake it in different ways, either in my grandmother's garage in the winter, or by that gas meter in summer, if it wasn't too hot, but that shade was always good and a breeze usually blew through there. Man, the things we could imagine you could see through those fig leaves. . . Kids today don't know what they're missing with their preprogrammed games.
SM, you or the plumber will have to call 811 for the gas line(and other utilities) to be marked out if there is any digging to be done. The markout is done for free. Here in DE they have three business days to complete the markouts.
Once everything is marked out, take pictures of where all the lines are for future reference.
I hope a plumber can repair the leak—that it is at a joint that is accessible—without digging.
That would be the ideal resolution.
It will be a battle for PG&E to accept any responsibility for the gas line itself. A photograph showing the original meter location at the back house would be your strongest evidence.