Executive Producer Jan Kunt from Bohemia Interactive have released a beta version of the Carrier Command: Gaea Mission SDK on the BI forums.
Quote Jan Kunt : Finally, after taking much longer than I originally expected, here is the first version of CCGM SDK.
This version is distributed as a Beta Patch, which also installs SDK.
This installer works for regular non steam version. Steam users may get SDK by selecting "SDK" in the beta tab in Preferences of Carrier Command in their Steam Library.
Information about how to use it may be found on the bistudio wiki.
Special SDK section have been also created in the Feedback tracker for reporting bugs.
Special note - carrier.exe parameter "-mod" will only work on version 1.03.0019 and above (version included in this patch). If there are no major issues with the SDK we will shortly release patch 1.04 to introduce this modding compatibility to all customers.