According to GSL Code S progamer NSPGenius, GSL has made plans to remove 4 maps from its official rotation. According to several sources, the maps will be replaced by new ones that are currently undergoing testing and will remain in a candidacy stage.
The maps expected to be removed are:
1. Steppes of War
2. Delta Quadrant
3. Blistering Sands
The custom maps that are candidates to replace the 4 above are:
Currently, the change has not yet been announced by GSL admins, however it is expected that an announcement will be made when the new maps have been selected.