GFCI 240v 30amp, install

I have an old spa at my house in Mexico. It is hard wired from a 30amp, 240v breaker box 60' away. It is a 3 wire run (black, red, white). When I first got it I disconnected the electrical heater, and simply ran the water through a 150k propane spa heater for better heating times. Everything worked great. Know the whole power board is fried. I tested the 240v water pump and it works, but now I need to make it safe. I do not have a bare ground wire, only a white neutral. If I install a breaker box, put in a 2 pole 30amp 240v GFCI breaker, use the curly wire to the neutral board (wired from the incoming neutral), then take the neutral from the breaker, and the two hots coming out to the two pole breaker I then would have a protected GFI circuit correct?

Yes, that should give sufficient protection.

You could also drive a ground rod to provide the bare ground wire, but that is not really part of the gfci circuit.
2 pole gfci

Steve, with all due respect but in response to your statement

"You could also drive a ground rod to provide the bare ground wire"

That could be misleading and dangerous to a lay person thinking driving a ground rod and attaching a wire to it can substitute and serve in any way for a proper, safe and code compliant, POSSIBLE LIFE SAVING EQUIPMENT GROUNDING CONDUCTOR.

In the main distribution panel the Equipment Ground Buss (where green and bare safety grounding conductors wire) and Neutral Buss (where white Neutrals wire) are BONDED. The Neutral serves as the normal return current conductor, while the safety Equipment GroundING Conductor provides a dedicated low impedance return path FOR FAULT CURRENT ONLY.

If you drive a ground rod and wire to it mistakenly as the equipment grounding conductor, the impedance of mother earth may well be too high so fault current would NOT be enough to trip the breaker and save a life !!!!!!!!!!! If the equipment GroundING conductor is bonded to Neutral per the NEC and obvious safety reasons, fault current will trip the breaker but NOT if it just goes to a mother earth driven ground rod YIKES

Hope this helps, I'm here to help and educate and maybe save a life NOT to fight lol

Best wishes and God Bless

John T Long retired electrical power distribution design engineer and rusty on this so no warranty BUT BELIEVE THE ABOVE IS STILL ACCURATE