Why would they operate out of a gas plant if they intend to be carbon neutral?

Either they offset it by creating green electricity elsewhere, in which case they should be using that instead of gas in the first place, or either they are offseting using very slow "net-neutral" schemes such as agroforestry, in which case the harm they do will not be compensated until 30 years on.

The answer is in the press release: Portfolio of Fully Accredited Carbon Offset Credits Starting June 1st

Then it means a huge carbon footprint not offset until decades from now.

(as carbon offsetting is typically slow)

So their business is criminal.

You're using their press release as a source? I can't tell if it's intended to be ironic or serious.