I have a WPS qualified for .045 GMAW-P for an 8mm single pass overhead fillet.
Done with Miller Axcess equipment and Accu-Pulse waveform.
Achieving acceptable Bead profile is tricky, settings, technique, travel speed variables are pretty narrow, so it takes an Operator who knows what they're doing. Otherwise, re-work will be an issue.
Using 90/10 gas and ER70S-6 (Lincoln L56).
Tim