As of now, Coinbase does not support LGB. LGB is not listed on Coinbase and cannot be bought or sold directly on the platform.
However, there are a few workaround methods that can be used in order to indirectly purchase LGB.
The first method is to use a different exchange that does support LGB. There are a few exchanges that list LGB, such as Binance, Huobi, and OKEx.
Once you have purchased LGB on one of these exchanges, you can then send it to your Coinbase wallet.
The second method is to use a service like Changelly or Shapeshift. These services act as an intermediary between exchanges that do and do not support LGB.
You can use these services to convert your currency into LGB, and then send it to your Coinbase wallet.
Neither of these methods is perfect, and both come with their own set of risks. However, they are the only ways to indirectly purchase LGB on Coinbase at the moment.
Hopefully in the future Coinbase will add support for LGB directly on the platform.