Copying your own trades is allowed.
You may copy your own trades across your own GFF accounts, and across accounts you hold elsewhere. If you buy a multi account bundle, copying your own trades into each of them is the intended use.
Copying other people is not.
Trading someone else's calls, whether from a signal provider, a trading group, a third party service, a copy or mirror service, or an EA that follows an external source, is a prohibited trading practice and may result in account termination.
There is a practical reason beyond fairness. When several unrelated traders follow the same source, their accounts hold matching positions at matching times. Where that is detected, every account and user involved may be suspended, including people who did not know others were following the same signals.
Automated strategies.
Your own automated strategies and EAs are allowed, as long as they reflect your own trading and do not exploit latency, data feed anomalies or system vulnerabilities.
If you are unsure whether a service or method is permitted, contact support before using it.