There are a couple ways to interpret what you're saying: that PG&E charges a higher rate relative to the national average for gas vs. electricity, which is what

There are a couple ways to interpret what you're saying: that PG&E charges a higher rate relative to the national average for gas vs. electricity, which is what I think you mean, and that PG&E charges more for a joule of gas than a joule of electricity. Presuming you meant it the first way, it's still possible that heating with gas is cheaper, since the national average for a joule's worth of natural gas is quite a bit cheaper than the same for electricity.