I'm a computational biologist that recently ported our webserver (genestation.org) from Tripal (PHP/Drupal) to Go. The performance gains were huge, but the simplicity of development and deployment was even better. I'd strongly recommend Go for a biology web server. However, Biogo is not remotely as far along as Biopython or Bioperl. Also, Perl beats Go for ease of string handling. Unfortunately, there is no equivalent to Numpy/Scipy in Go. Despite these areas of weakness in the ecosystem, I have switched to Go entirely except for one-liners and one-off parsing in Perl.