Do you have any screenshots with Gparted showing the partitions as well? It would just be nice to get a visual as to which partition has what flags applied to it. You are generally able to move a partition to the left, then resize once moved to take up the remaining space on the right. It is going to require you to do it from a live system off a USB for example (like a live Zorin instance), and I would HIGHLY recommend backing up anything important before doing so.
Moving to the left is generally a little more dangerous than just to the right or expanding, but as long as you're careful it should be no different than anything else.