EXHIBIT 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We hereby consent to the incorporation by reference in this Post-Effective Amendment to the Registration Statement on
Form S-1 (File No. 333-127498) of Gastar Exploration Ltd. of our report dated March 21, 2006 relating to the consolidated financial statements of Gastar Exploration Ltd. and subsidiaries, which appears in the Annual Report on Form 10-K of Gastar Exploration Ltd. for the year ended December 31, 2005.
We also consent to the reference to us under the heading “Experts” contained in the Prospectus.
/s/ BDO SEIDMAN, LLP
Dallas, Texas
April 13, 2006