@Abiky, it is possible. How this could work out is to just simply create a digital version (coin/token) of the name of that gas. To, however, give value to that coin is to simply back it up with the gas, which is a physical asset, after which liquidity can be provided to ensure that the price is stable and that it correlates with the price of the gas in the market. This same coin can be listed on exchanges for traders to trade them.
The same way stablecoin-issuers back their token with USD reserves, they same way gas companies could back their token with gas/fuel reserves. If the need arises, mainstream companies will make this happen in the future. The easiest route would be to accept existent cryptocurrencies like Bitcoin or Ethereum, instead of creating a new token from scratch. But that is up to the gas companies themselves.
Speaking of gas, Venezuela has launched a cryptocurrency (Petro) that's widely backed by its petroleum reserves. This is a good example of using crypto at gas stations. As of know, the country is accepting Petro at airports and some casinos. But gas stations on the country could start accepting Petros as well. In this case, the cryptocurrency is backed by the government. But it doesn't necessarily have to be that way. A private entity could launch its own cryptocurrency or Blockchain token that could be backed 1:1 to gas reserves. There are so many ways to do this, limited by a company's own imagination.
But I believe this will take a long time before becoming a reality, since people are still used to paying with Fiat at a gas station of their choice. And this is for a very good reason. Fiat is stable in price while crypto is not. This could change though, with proper regulation into the crypto/Blockchain industry by worldwide governments. With demand for a crypto-based gas station, anything is possible. Just my opinion