Database [Partition] increase /system partition ?

Hello everyone, now I'm trying to flash Paranoid4 with full gapps, But the problem is that the SGS II System partition is only 512Mb.
When I try to flash gapps, I get insuficient storage. Gapps need 320Mb and i've only 250Mb free.

There does not it a way to change the size of the partition or install gapps in /data?

I have this topic:
But I do not understand the approach to be followed, apparently you can do with lvm (if I understood a little ...).

(Sorry for my english, i'm french)

Thanks !!!!