What about the Bitcoin transaction fees ? Wouldn't it be easier to use Ethereum or something else? Actually, Ethereum is also known for its high transaction fees.
Both of them are fine there's no problem with using Ethereum or BTC but I prefer BTC.
The current Bitcoin network is stable and not congested recommended fee is around 4sat/vb meaning it's cheap compared to a few months ago. So there's no problem sending BTC from your wallet to the receiver(Gcash address).
Use this tool to know what fees to use
https://mempool.space/ because from time to time the recommended fee changes.