You can download the latest MFC MAPI utility to view GAL entries, which uses the Messaging API to provide access to MAPI stores through a graphical user interface.

Try the following steps:

1) Open MFC MAPI utility. Select Session menu and select “Logon and Display  Store table” ( I chosen for this session). It will ask you prompt the profile.

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2) Select the profile. Once you select it, it will open the stores associated with it.

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3) Select Address Book Menu and select "Open Default Directory” option

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4) It will list out the GAL entries

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5) If you select a GAL entry in the top pane, it will display its associated properties, tag, type, value etc in its below pane.

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