There are several ways.... but I go into the chart of accounts and add an account (if one doesn't already exist) for the credit card and include the last 4 digits in the name (in case there are several cards).  In the Class Options tab, I change the Account Class to "Bank", save and close.  Then, when you use the purchase journal to do your entries, you can choose the credit card in the "Paid from" drop down.  All items posted this way will appear in the credit card's General Ledger account.  When you make a payment to the credit card, CR the bank and DR the credit card account....you should be able to reconcile your statements easily.