XRP deposits will normally be credited within minutes.
Other cryptocurrency (BTC, ETH, ETC, REP) deposits will normally be deposited within one hour since being first confirmed on the corresponding network (Bitcoin or Ethereum/Classic).
It can sometimes take more, however, up to a few hours is still normal in some (rare) circumstances.
Please track your deposit transaction in the wallet/service you sent it from, or on public blockchain explorers until it reaches one confirmation. After this, it will normally be credited within an hour or two.
To track your transactions, you can use one of the following public blockchain explorers:
https://xrpcharts.ripple.com/#/graph -- XRP Ledger accounts
https://xrpcharts.ripple.com/#/transactions -- XRP Ledger transactions
https://bithomp.com/explorer/ -- XRP Ledger accounts with a cleaner transaction overview
To see the REP balance and transactions for an address, enter the address in the “Filter By Address” field.
Funds have left my deposit address
Deposit addresses are transitional by nature. They should always be empty.
Once your deposit has been forwarded from your deposit address to one of our native hot/cold wallets, your deposit should be credited shortly.
Please see the following articles for more information:
How funds come and go from GateHub
What do I do if my deposit takes significantly longer than expected?