Online service to test emails in Gmail on iOS

I need to fix a bug in an email that renders fine on all clients except Gmail for iOS, and I don't have an iPhone (and neither my friends). I do have a Mac with iOS simulator but it's not possible to install Gmail there as far as I know.

So I'm looking for an online service that would let me do this. So far nobile email testing services I've seen allow me to test on various iOS devices but they are limited to the stock Mail app.

Does anybody know a site that lets you test emails on iOS in Gmail?