# Installing and using GsRevit
This entry outlines how to use GsRevit to bi-directionally export, import and update data in GSA.
# Initial setup
Install Revit and GSA in the following sequence to see the GsRevit plug-in in Revit.
- Install Revit
- Install GSA
Note: If Revit is installed after GSA then run GsaRegister.exe with administrative rights, located in the GSA installation directory. The video below describes how to set up the GsRevit plug-in.
GsRevit - Initial Setup from Oasys on Vimeo.
# Section mapping
GSA maps sections in the following ways:
- One-to-one mapping
- High level mapping
Refer to the Section Mapping References for a more detailed explanation.
The following video describes how to map a section in GsRevit:
GsRevit - Section Mapping from Oasys on Vimeo.
# Export to GSA
GsRevit allows you to export a Revit model in GSA as well as updating existing GSA models to reflect changes in Revit. Refer to the Export to GSA References for a more detailed explanation.
The following video describes how to export and update a Revit model in GSA.
GsRevit - Export Revit Model and Update from Oasys on Vimeo.
# Import from GSA
GsRevit can also import a GSA model in Revit as well as update an existing Revit model to reflect any changes in GSA. Refer to the Import to Revit References for a more detailed explanation.
The following video describes how to import and update a GSA model in Revit.