Is it possible to use BitGo's wallet with other software (Electrum or else), what is the used derivation path?
Looking at the BitGoJS code it would appear that the derivation path is m/0/0/derivationChain/*.
Looking further, the derivationChain seems to be a code depending on the address type:
    [0, UnspentType.p2sh, Purpose.external],
    [10, UnspentType.p2shP2wsh, Purpose.external],
    [20, UnspentType.p2wsh, Purpose.external],

    [1, UnspentType.p2sh, Purpose.internal],
    [11, UnspentType.p2shP2wsh, Purpose.internal],
    [21, UnspentType.p2wsh, Purpose.internal],