user65066: I understand that CoinBase has weekly buy and sell limits. Does GDAX have this as well?

user63987: No.
From the GDAX support page (source):

Deposit (BTC, ETH, LTC): Unlimited
Deposit (ACH or SEPA): Varies
Deposit (USD via wire): Unlimited
Trade: Unlimited
Balance: Unlimited
Withdrawal: $10,000/day for individual accounts and $50,000/day for
  institutional accounts. To be considered for higher withdrawal limits,
  please go to your Settings within GDAX and click "Increase Limits."


65066: <p>I understand that CoinBase has weekly buy and sell limits. Does GDAX have this as well?</p>
 63987: <p>No.</p>

<p>From the GDAX support page (<a href="https://support.gdax.com/customer/en/portal/articles/2426595-gdax-limits-for-deposits-withdrawals-trades-and-balances" rel="nofollow noreferrer">source</a>):</p>

<blockquote>
  <p>Deposit (BTC, ETH, LTC): Unlimited</p>
  
  <p>Deposit (ACH or SEPA): Varies</p>
  
  <p>Deposit (USD via wire): Unlimited</p>
  
  <p>Trade: Unlimited</p>
  
  <p>Balance: Unlimited</p>
  
  <p>Withdrawal: $10,000/day for individual accounts and $50,000/day for
  institutional accounts. To be considered for higher withdrawal limits,
  please go to your Settings within GDAX and click "Increase Limits."</p>
</blockquote>
