Zen Coding (Emmet) doesn't work with GSP

When trying to expand an expression like .some-class or #some-id, it simply doesn't works.

Using IDEA-13 build 133.193

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*Imported from [IDEA-117681](https://youtrack.jetbrains.com/issue/IDEA-117681) · Type: Bug · Votes: 3*
*Comments, attachments, dates and reporter are not part of the export — follow the link above for the full history.*

Start by reproducing the reported expansion failure in a GSP file using IntelliJ IDEA 13 build 133.193, then locate the plugin's integration with Zen Coding (Emmet). Done means expressions such as .some-class and #some-id expand correctly in GSP files.

Written by the indexing model from the issue text.