Utility panels, gas pipe and building an extension
Gas
The gas meter will have to be relocated.
The gas company may handle the plumbing up to the meter, but you'll be responsible for extending the indoor plumbing to the new location.  The gas may be off for a few days, while the relocation is completed, pressure tested, and inspected.
Water
Depending on the supplier and local requirements, the water meter may not have to be relocated.  You'll have to ask your specific utility.
Electric
The electric meter will also likely have to be relocated.
As with the gas, the utility may handle the service conductors, but you'll be responsible for anything after the meter.