What Dracoluna said! My girl is a 2006 and she weighs about 550g right now. And I feed her every 7-10 days. Every few weeks I'll skip a meal just so she's not getting too pudgy.

Great job on getting her back up to a healthy weight. I wouldn't worry to much about the weight gain. It could just be this time of year, they tend to simply gain more weight in preparation for breeding, or it could be that she's retaining a little poo and took a large drink of water right before you put her on the scale. As long as she's pooping and the weight isn't going down, I wouldn't worry if its going up.