JOINT FILING AGREEMENT

Exhibit A

CUSIP No. 37929X 107  Page 13  of  15 

JOINT FILING AGREEMENT

     In accordance with the requirements of Rule 13d-1(k) under the Securities Exchange Act of 1934, as amended, and subject to the limitations set forth therein, the parties set forth below agree to jointly file the Schedule 13D to which this joint filing agreement is attached, and have duly executed this joint filing agreement as of the date set forth below.

Dated: November 7, 2007	Berggruen Acquisition Holdings Ltd
	By:	/s/ Xxxxx X. Xxxxxxxxx
		Name:	Xxxxx X. Xxxxxxxxx
		Title:	Secretary

	Berggruen Holdings North America Ltd
	By:	/s/ Xxxxx X. Xxxxxxxxx
		Name:	Xxxxx X. Xxxxxxxxx
		Title:	Director

	Medici I Investments Corp.
	By:	/s/ Xxxxx X. Xxxxxxxxx
		Name:	Xxxxx X. Xxxxxxxxx
		Title:	Director

	Berggruen Holdings Ltd
	By:	/s/ Xxxxx X. Xxxxxxxxx
		Name:	Xxxxx X. Xxxxxxxxx
		Title:	Director

	Tarragona Trust By: Maitland Trustees Limited, as Trustee
	By:	/s/ Xxxxx X. Xxxxxxxxx
		Name:	Xxxxx X. Xxxxxxxxx
		Title:	Authorized Signatory

*  

Xxxxxxx Xxxxxxxxx 

* The undersigned, by signing his name hereto, does sign and execute this Joint Filing Agreement pursuant to the Limited Power of Attorney executed by the above Reporting Persons and incorporated by reference hereto on behalf of the Reporting Persons.

Dated: November 7, 2007	*By:	/s/ Xxxxx X. Xxxxxxxxx, Attorney in Fact
		Xxxxx X. Xxxxxxxxx

CUSIP No. 37929X 107  Page 14  of  15 

SCHEDULE A

Berggruen Acquisition Holdings Ltd

     Set forth below is the name and business address of each director and executive officer of Berggruen Acquisition Holdings Ltd. Each such person is a citizen of the United States of America.

Name		Title		Address
Xxxxxxx Xxxxxxxxx		Sole Director, President, Vice President and Treasurer		0-00 Xxxxxxxxx Xxxxxxx Xxxxxx, XX0X XXX Xxxxxx Xxxxxxx
Xxxxx Xxxxxxxxx		Secretary		0000 Xxxxxx xx xxx Xxxxxxxx 00xx Xxxxx Xxx Xxxx, XX 00000

Berggruen Holdings North America Ltd

     Set forth below is the name and business address of each director of Berggruen Holdings North America Ltd. There are no executive officers of Berggruen Holdings North America Ltd. Each such person is a citizen of the United States of America, except for Xx. Xxxx who is a citizen of Great Britain.

Name		Title		Address
Xxxxxxx Xxxxxxxxx		Director		0-00 Xxxxxxxxx Xxxxxxx Xxxxxx, XX0X XXX Xxxxxx Xxxxxxx
Xxxxx Xxxxxxxxx		Director		0000 Xxxxxx xx xxx Xxxxxxxx 00xx Xxxxx Xxx Xxxx, XX 00000
Xxxxxx Xxxx		Director		Xxxx Xxxx XX Xxx 000 Xxxx Xxxx, Xxxxxxx Xxxxxxx Xxxxxx Xxxxxxx

CUSIP No. 37929X 107  Page 15  of  15 

Medici I Investments Corp.

     Set forth below is the name and business address of each director of Medici I Investments Corp. There are no executive officers of Medici I Investments Corp. Each such person is a citizen of the United States of America, except for Xx. Xxxx who is a citizen of Great Britain.

Name		Title		Address
Xxxxxxx Xxxxxxxxx		Director		0-00 Xxxxxxxxx Xxxxxxx Xxxxxx, XX0X XXX Xxxxxx Xxxxxxx
Xxxxx Xxxxxxxxx		Director		0000 Xxxxxx xx xxx Xxxxxxxx 00xx Xxxxx Xxx Xxxx, XX 00000
Xxxxxx Xxxx		Director		Xxxx Xxxx XX Xxx 000 Xxxx Xxxx, Xxxxxxx Xxxxxxx Virgin Islands

Berggruen Holdings Ltd

     Set forth below is the name and business address of each director of Berggruen Holdings Ltd. There are no executive officers of Berggruen Holdings Ltd. Each such person is a citizen of the United States of America, except for Xx. Xxxx who is a citizen of Great Britain.

Name		Title		Address
Xxxxxxx Xxxxxxxxx		Director		0-00 Xxxxxxxxx Xxxxxxx Xxxxxx, XX0X XXX Xxxxxx Xxxxxxx
Xxxxx Xxxxxxxxx		Director		0000 Xxxxxx xx xxx Xxxxxxxx 00xx Xxxxx Xxx Xxxx, XX 00000
Xxxxxx Xxxx		Director		Xxxx Xxxx XX Xxx 000 Xxxx Xxxx, Xxxxxxx Xxxxxxx Xxxxxx Xxxxxxx