If you want to enable a fulltext catalog then here is the statement:
use <dbname>
go
sp_fulltext_database 'enable'
to stop/start population, rebuild or drop use this statement
use <dbname>
go
sp_fulltext_catalog '<catalog name>','create/drop/rebuild/stop', '<path if you are creating new>'to get all fulltext catalog information for that database
use <dbname>
go
EXEC sp_help_fulltext_catalogs '<catalog name>'
to get fulltextcatalog property
use dbname
go
select FULLTEXTCATALOGPROPERTY('catalog name','status')