Originally Posted by tonyc318
Do you think 1 pack of 05 will be ok?
Should be. I use one pack of dry yeast in all my brews.
Most of the pitching calculators seem to think that 1 of the 11.5 gram packets of dry yeast (which is what I think all the fermentis yeast is available in?) is sufficient. EDIT: for an ale of this gravity.
Also, as a note, if this is your first GF brew, you can expect that fermentation will be a little slower than it would be for a non-gf beer with the same yeast, gravity, etc...