Am I correct that there is no regulation concerning the proximity of an outdoor receptacle to a gas meter/regulator?
No, you need 3 feet of clearance from the regulator vent in any direction. This is a Gas Code Regulation.
Here is one Gas Companies rules...
https://pse.com/accountsandservices/Construction/Documents/3885.pdfPage 4 has electrical specs...
I once had a situation where we couldn't get the full 3ft of clearance for a utility meter and the plumber piped the vent away from the regulator to comply.
