Magkacash-in ka using gcash to coins.ph? As of today, operational naman pesonet at Instapay cash-in ng coins.ph [source:
https://status.coins.ph/], so wala dapat problema dyan.
As for gcash, I did not encounter any trouble using that app, like ever.
Tho, I would still suggest not putting a lot of money on it just to be safe. I've read numerous user complaints online (lalo na sa FB) that the access to their accounts/app were blocked (not sure if legit complaint tho).
It's better to just use it as a middleman or gateway for payments or transfers.