Exhibit 23.3

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the use in this Registration Statement on Form S-1 of our report dated March 19, 2019 relating to the statutory financial statements of Great-West Life & Annuity Insurance Company, appearing in the Prospectus, which is part of this Registration Statement.

We also consent to the reference to us under the headings “Selected Financial Data” and “Experts” in such Prospectus.

/s/ DELOITTE & TOUCHE LLP

Denver, Colorado

March 29, 2019