If you are crediting into your Gatecoin account from another exchange or wallet and your transaction is still unconfirmed after several block confirmations (time varies by cryptocurrency) then it probably means that the network/miner fee that you have paid for this transaction to be processed is too low. If you are using a personal wallet, try paying a higher fee. If you are using another exchange, then the exchange will set their own fees and if they do not pay enough then the transaction will take more time.
The Bitcoin/Bitcoin Cash/Ethereum miners will always process the transactions with the greatest fees over the transaction with the lowest fees. So, naturally they would prefer to include the transactions with the highest fees first. If your fee is high enough – your transaction will go through faster.
As a result, when crediting cryptocurrencies on Gatecoin, please make sure that you have sent the funds with an appropriate fee. For Bitcoin transactions, you can check https://bitcoinfees.info/ for more information.
Note that withdrawals from Gatecoin to another wallet are subjected to a standard fee that will be used to pay the miners.