No, the head gasket and an evap leak are totally unrelated–in every way.
If you go to the top of this page and click on the “mechanics files” link, you will get a searchable database of recommended mechanics. Just plug your zip code into the search, and you will get names and details regarding mechanics near you.
Personally, I wouldn’t spend the money to replace the head gasket (and machine the cylinder head) on a 14 year old car that may have many other issues…