CONSIDER: Spray Arc is a pre-qualified process if you follow the requirements of Section 3 of AWS D1.1. See Paragraph 3.7 and Table 3.7. Consider writing your own and save big $$$.
I believe the AWS published Standard WPS is B2.1-1-235-2006
PS - per your topic - In my experience, GMAW is generally accepted to mean spray ; GMAW-S is meant to be short arc.
"B2.1-1-235:200X, Standard Welding Procedure Specification (SWPS) for Argon Plus 2% Oxygen Shielded Gas Metal Arc Welding (Spray Transfer Mode) of Carbon Steel (M-1/P-1/S-1) Groups 1 and 2, 1/8 through 1-1/2 inch thick, ER70S-3, Flat Position Only, As-Welded or PWHT Condition, Primarily Pipe Applications. New Standard -- $25.00. [ANSI Public Review expires 2/13/06.]"