2013 it seems there is blog about combining 10 GB gmail to 5 GB drive and Google+ Photos... https://gmail.googleblog.com/2013/05/bringing-it-all-together-15-gb

2013 it seems there is blog about combining 10 GB gmail to 5 GB drive and Google+ Photos... https://gmail.googleblog.com/2013/05/bringing-it-all-together-15-gb-now.html https://gmail.googleblog.com/2013/05/bringing-it-all-togethe... Not sure if it was unlimited actually before this point.