Bitcoin Gold Ledger Derivation path
Finally I found the answer: the path is m/44'/156'/0'/0/0, it gave me expected GX1FXv2PrRSARyctabywsi5X58teAjYFU4 address.

Address header should be 38, dumpedPrivateKeyHeader same as in BTC (=128).

For those, who is seeking parameters for different bitcoin-like altcoins: I found many of them in the Coinomi repository.

UPDATE1: As it was mentioned by @john-doe, if you want to reproduce the address this way, you should switch to BIP32 tab and enter the path without the last segment (it would be added automatically for generated addresses).