I think you download the desktop wallet and transfer your NEO to your wallet. Then as long as it remains in the wallet, it collects daily gas.

Atleast I think that's how it works. I don't know precisely. I think a new wallet will be released in the next few days. Maybe wait for that and then transfer and collect GAS.

GAS, by the way is what 'fuels' the NEO blockchain. Just like how you need to pay ETH to run an operation on the Ethereum blockchain, you will use GAS to run operations on the NEO blockchain. GAS is only produced by people holding NEO.