How To Create RSS Feeds For Google+?

You can get your G+ ID by clicking profile and then copy the number from your address bar.

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[a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgmTSMyiHwaaGOG9kt9cyXFmmBykVOqE3BKYIqJMvP6ESv2kxULSxBoGHLaDbW1pn1bCW2MPvJfLkS9NMv9QPl2bCW7wo4amzgN-AAM5D4qS9jz1yaLNzroVE1nU9hOa2RjneMnjdBk90U/s1600-h/image%25255B20%25255D.png"][/a]

Now once you created the Feed URL simply share it with your visitors using this HTML Code,

<a href="http://plusfeed.appspot.com/104961845171318028721" rel="nofollow" target="_blank" >Subscribe to our G+ Updates</a>

I have optimized the link so you can safely use it. On clicking the link your visitors will see this page,

[a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEj4oQf-BZQaCFfUzNVNV_3J2T0BduTmNoG7_ejZyBwJeRNpzca4XtAxwbROpMAM5PNutI6uxs0QrRn_rPS9wL7jpmudUMi1EaMeDJYRGv9mV4DoWoDOYpqnaRYG2581Ai-cYTXfUkjd8i8/s1600-h/image%25255B4%25255D.png"][/a]

From the Subscribe to this feed using option they can choose which service to use to subscribe to your updates. That's all! have fun :)

Source: http://www.mybloggertricks.com/2011/08/how-to-create-rss-feeds-for-google.html