I have held this stock for a while and it seems to trade in this fashion. It sits dormant for a while and then it rockets up. It is quite typical of stocks that are not overly liquid.
However to answer your question, the only obvious reasons for its current rise it some good drilling results extending its IO reserves, and a general pick up in sentiment around the resouce sector that Giralia offers a diversified exposure to.
Cheers
GIR Price at posting:
82.0¢ Sentiment: Hold Disclosure: Held