Traditionally, the Ga. Supremes do not issue "advisory opinions". The only exception has been that the 11th Cir. U.S. Court of Appeals can send a "certified question" to the Ga. Supremes about Georgia law when that law is not clear.
This amendment simply expands that "certified question" provision to any state or federal court. So a U.S. District Court or (I presume) the U.S. Supreme Court could ask a question of Ga. law to the Ga. Supreme Court.
All in all I think a good idea (although it will increase the workload on the Supremes).
That said, it is a VERY good idea to leave something blank if you don't understand it! I left two races blank (our State Representative and one County Commissioner) because they were running unopposed and I can't stand either one of them!
I left a few blank also...candidates running unopposed and I loathe them.
I also voted FOR the amendment regarding gay marriage. I have no problems with "civil unions"-just don't flaunt it in my face.