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 CUSIP No. 36225V104                                                 13G    Page 1 of 5 Pages 
Washington, D.C. 20549
Under the Securities Exchange Act of 1934
GP Strategies Corporation

(Name of Issuer)
Common Stock, par value $0.01 per share

(Title of Class of Securities)

(CUSIP Number)
December 31, 2008

(Date of Event Which Requires Filing of this Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed: 
  x  Rule 13d-1(b)         
  ¨   Rule 13d-1(c)         
  ¨   Rule 13d-1(d)         
The information required in the remainder of this cover page shall not be deemed to be “filed” for the 
purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the 
liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see 
the Notes).         

CUSIP No. 36225V104    13G    Page 2 of 5 Pages 
           1. Name of Reporting Persons.         
               I.R.S. Identification No. of above persons (entities only).     
               Delaware Charter Guarantee & Trust Company dba Principal Trust Company as Trustee for the GP
               Retirement Savings Plan, IRS No. 51-0099493.     
           2. Check the Appropriate Box if a Member of a Group:     
                     (a)  ¨            
                     (b)  ¨            
           3. SEC Use Only         
           4. Citizenship or Place of Organization:  Delaware     
 Number of Shares Beneficially Owned by Each Reporting Person With:     
    5. Sole Voting Power:         
Number of    6. Shared Voting Power:         
Shares             852,554         
 Owned By    7. Sole Dispositive Power:         
Each             0         
Person With:    8. Shared Dispositive Power:     
           9. Aggregate Amount Beneficially owned by Each Reporting Person:   852,554     
           10. Check if Aggregate Amount in Row (9) Excludes Certain Shares:  ¨    
           11. Percent of Class Represented by Amount in Row (9):     5.30%     


           12. Type of Reporting Person:      EP         

CUSIP No. 36225V104    13G    Page 3 of 5 Pages 
Item 1.             
(a) Name of Issuer:        GP Strategies Corporation 
(b) Address of Issuer’s Principal Executive Offices:    6095 Marshalee Drive, Suite 300 
            Elkridge, MD 21075-5926 
Item 2.             
(a) – (c) Name, Principal Business Address and Citizenship of Person Filing: 
         Delaware Charter Guarantee & Trust Company dba Principal Trust Company as Trustee 
         for the GP Retirement Savings Plan     
         1013 Centre Road         
         Wilmington, Delaware 19805         
         Citizenship:    Delaware         
(d) Title of Class of Securities:    Common Stock, par value $0.01 per share 
(e) CUSIP Number:    36225V104     
Item 3. If this statement is filed pursuant to Rule 13D-1(b) or 13D-2(b) or (c), check whether the 
person filing is a:             
x   (f) An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F); 
Item 4. Ownership - Provide the following information regarding the aggregate number and 
percentage of the class of securities of the issuer identified in Item 1. 
(a) The GP Retirement Savings Plan (“Plan”) is subject to the Employee Retirement Income 
      Security Act of 1974 (“ERISA”). Delaware Charter Guarantee & Trust Company dba 
      Principal Trust Company acts as the Trustee for the 401(k) Plan Trust. As of December 31, 
      2008, the 401(k) Plan Trust held 852,554 shares of the Issuer’s common stock. The securities 
      reported include all shares held of record by the Trustee as trustee of the Trust. The Trustee 
      follows the directions of the Issuer and/or Plan participants with respect to voting and 
      disposition of shares. The Trustee, however, is subject to fiduciary duties under ERISA. The 
      Trustee disclaims beneficial ownership of the shares of common stock that are the subject of 
      this Schedule 13G.         
(b) The 852,554 shares of common stock represent 5.30% of the Issuer’s outstanding shares of 
      common stock. The percent of class is based on shares outstanding as of December 31, 2008, 
      as provided by the Issuer.         

 CUSIP No. 36225V104    13G    Page 4 of 5 Pages 
(c) Number of shares as to which such person has:     
         (i)    Sole power to vote or direct the vote: 0     
         (ii)    Shared power to vote or direct the vote: 852,554     
         (iii)    Sole power to dispose or direct the disposition of: 0     
         (iv)    Shared power to dispose or direct the disposition of: 852,554     
Item 5. Ownership of Five Percent or Less of Class     
Not Applicable         
Item 6. Ownership of More Than Five Percent on Behalf of Another Person 
Not Applicable         
Item 7. Identification and Classification of the Subsidiary Which Acquired the Security Being 
Reported on by the Parent Holding Company     
Not Applicable         
Item 8. Identification and Classification of Members of the Group     
Not Applicable         
Item 9. Notice of Dissolution of Group         
Not Applicable         
Item 10. Certification         
By signing below I certify that, to the best of my knowledge and belief, the securities referred to above 
were acquired and are held in the ordinary course of business and were not acquired and are not held 
for the purpose of or with the effect of having or influencing the control of the issuer of the securities 
and are not acquired and are not held in connection with or as a participant in any transaction having 
that purpose or effect.         

 CUSIP No. 36225V104       13G    Page 5 of 5 Pages 
After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set 
forth in this statement is true, complete and correct.     
    Delaware Charter Guarantee & Trust Company 
    /s/ Kristin Camp
    Kristin Camp     
    Director of Operations     
    January 26, 2009