I need to send Bitcoin from Electrum wallet If I don't loos Bitcoin Gold at the same time. Is it possible to loose BTG after sending BTC from Electrum wallet?
No, Bitcoin Gold has a
replay protection. That means the broadcasted transaction from the current chain cannot rely on the other chain, in other words, not accepted by the other chain.
However,
at the next fork, there might be a risk of replay, because it is unknown whether they implemented a replay protection.