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Everything2 -GRAS does not have much on this topic.
http://everything2.com/index.pl?node_id=670226

Wikipedia -GRAS does not have much either.
http://en.wikipedia.org/wiki/GRAS

GRAS (Generally Recognized As Safe)

Summary of All GRAS Notices summary tables that provides information about GRAS notices received within each year since 1998, when FDA received its first GRAS notice.
http://www.cfsan.fda.gov/~rdb/opa-gras.html

Background Information for Consumers includes Food and Color Additives, Fat Substitutes (Olestra), Food Irradiation , Food Packaging, MSG (MonoSodium Glutemate), Preservatives, Sweetners and Sulfites.
http://www.cfsan.fda.gov/~dms/opa-bckg.html

GRAS FAQ a list of frequently asked questions (FAQ) is intended to be a convenient place to find answers to common questions about the food ingredient classification known as "generally recognized as safe" or "GRAS."
http://www.cfsan.fda.gov/~dms/grasguid.html

As listed in the GRAS FAQ under:

Partial GRAS List

16.   Does FDA have a list of substances that are used in food on the basis of the GRAS provision?

FDA has several lists of GRAS substances.  Importantly, these lists are not all-inclusive.  Because the use of a GRAS substance is not subject to premarket review and approval by FDA, it is impracticable to list all substances that are used in food on the basis of the GRAS provision.

• 21 CFR Part 182 contains the remnants of a list, which FDA established in its regulations shortly after passage of the 1958 Food Additives Amendment.  The list is organized according to the intended use of these substances.  As part of the agency's comprehensive review of GRAS substances in the 1970s, FDA affirmed that the use of some of the ingredients on this original GRAS list is GRAS, and moved the affirmed uses of the substance to 21 CFR Part 184.
• 21 CFR Part 184 contains a list of substances that FDA affirmed as GRAS as direct food ingredients for general or specific uses.  This list derives from the agency's 1970s comprehensive review of GRAS substances and from petitions that FDA received to affirm the GRAS status of particular uses of some food ingredients.
• 21 CFR Part 186 contains a list of substances that FDA affirmed as GRAS for certain indirect food uses.
• FDA's Internet site also contains a list of substances that have been the subject of a notice to FDA - i.e., when a firm has notified FDA about its view that a particular use of a substance is GRAS.  You can access this summary of GRAS notices, along with FDA's response, from the GRAS Notification Program page.