No, sorry nitrous oxide and nitric oxide are not the same thing! Nitric oxide is produced in the body. It is plays many roles, some good, some bad. It is a free radical, and a cellular signaling molecule. The only medical use I know of for pure nitric oxide (which is a gas) is for pulmonary hypertension, but it is very rare and expensive.
As far as ME/CFS goes, Dr Martin Pall has a theory called the NO/ONOO theory that involves the role of NO and free radicals in this illness and related ones such as MCS. It is a complex theory. He proposes a number of supplements that can influence the process. See:
http://www.thetenthparadigm.org/mcs09.htm
I'm not sure what you are thinking of in regard to Dr Goldstein. I was a patient of his years ago. He did use a number of NMDA antagonists (such as ketamine) with good result. Perhaps that's what you are thinking of? I seriously doubt he had access to nitric oxide gas. We couldn't even get it for a high risk surgery for a patient with severe pulmonary hypertension in an academic hospital (back in the early 2000s).