Virtually all the code base of gvSIG projects has been migrated to the package nomenclature of *org.gvsig.xxx*.
When migrating a project, imports should be updated in the same class. Eclipse provides tools to easily make the necessary changes.
A quick way of doing this, for example, is in the *package manager* to select all classes in the project, right-click on them and then select *Source > Organize Imports*.
On the other hand, if the project being migrated belongs to the gvSIG project itself, the packages should be renamed to also begin with *org.gvsig*.