Ex-99(b)

Certification Pursuant to Rule 30a-2(b) under the 1940 Act and Section 906 of the Sarbanes-Oxley Act

I, John R. Jones, President of GuideStone Funds (the “Registrant”), certify that:

1. The Form N-CSR of the Registrant (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

Date:  March 8 2019	/s/ John R. Jones
	John R. Jones, President
	(Principal Executive Officer)

I, Patrick Pattison, Vice President and Treasurer of GuideStone Funds (the “Registrant”), certify that:

1. The Form N-CSR of the Registrant (the “Report”) fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Registrant.

Date:  March 8, 2019	/s/ Patrick Pattison
	Patrick Pattison, Vice President and Treasurer
	(Principal Financial Officer)