access to page custom fields

HI, 

I'm using sharepoint 2007 and i have a list that contains pages name and there is a pdf file attached for each record. 

I should take each page name .. request the page at sharepoint and read some custom fields ( I mean : if i open the pages in edit mode i see always the same structure .. gpTitle, gpDescription, gpFooter, gpcarName .... ).

i'm trying to search on google but i didn't find anything ... someone can show me the way ? :)  

Thanks. 

Alex 

Alex