Hello Kim.
It's wonderful to hear that your school has had the vision to appoint your role! I know how you feel though because when I started in gifted education it was up to me to work out what and how I taught. Mind you, the advantage of this was the freedom I had to experiment. I agree with Annabel to use the net to find inspiration and teaching ideas.
You're welcome to look at my website to see my approach to gifted education in case that's useful.
www.thinkingoutsidethebox.com.au
A competition I think can be extremely beneficial to gifted children is Tournament of the Minds.
http://www.tom.edu.au/ It may well not be accessible to your school but you can use the ideas from their past competitions as a basis for stimulating classroom programs. The programs I've run in this style have been some of the most successful.
If I can help, please feel free to ask questions or chat about how things are going via this forum or email via my website (above).
Penny.