Using AI on the iPad, I just tried making a 1 inch square artboard containing a plain 0.5 inch vector square. I clicked “Publish and export”, then “Export as”, selected SVG as the format, made sure “Responsive” was not checked, and then hit the Export button. On the next screen I choose Airdrop (to my desktop) as the save destination.
The SVG opened in the GFUI at 0.375" square. It opened in AI (desktop version) at 0.5" square.
I did a Save-As with my normal SVG settings and no other changes, and that one opened in the GFUI at 0.5" as it should have.
Going back to the iPad version, I tried the same Export procedure but selected PDF. It loaded into the GFUI at 0.5" square.
Next, I used the desktop version of AI to open the cloud file of my original (iPad-made) half-inch square, selected it, hit copy, and then pasted it into the GFUI dashboard. It loaded as 0.5" square.
Finally, on the iPad, I again exported as a PDF but saved it to “Files” on the iPad. I went to the GFUI dashboard with the Chrome browser on iPad, and clicked Create >Upload from file, and selected my half-inch square PDF. It loaded into the GFUI as 0.5" square.
Conclusion: at the moment, SVGs from AI mobile app need to go through the desktop version, or a bounding box of a known dimension (and unique color) needs to be placed around the entire design for easy re-scaling in the app. PDFs don’t appear to have the same issues.
-disclaimer- AI for iPad is pretty new and we can expect things to change as it matures.
Also, this is a very simple test, with a single vector object and no text or embedded graphics.
-edit-
if someone cares enough to poke around in the code, here is the first svg straight from the ipad:
and here is the same graphic after doing the Save-as on the desktop: