The subject criteria (QCA) is at http://www.qca.org.uk/libraryAssets/media/qca-07-3454_gcsecriteriahistory.pdf

AQA's course is at http://www.aqa.org.uk/qual/newgcse/pdf/AQA-4045-W-SP-10.PDF - we'd want history b - the A course is SHP

OCR's is at http://www.ocr.org.uk/qualifications/gcsefor2009/history_b/index.html

Edexcel's specification is at http://www.edexcel.com/gcse2009/history/Pages/Overview.aspx

WJEC is at http://www.wjec.co.uk/index.php?subject=20&level=7&imageField2.x=39&imageField2.y=16

For interest, here's the QCA page about KS3  http://curriculum.qca.org.uk/subjects/history/index.aspx