The gti_import reads user GTI table and converts it to a table in ISDC format. The user GTI can be defined either in units of OBT, IJD, or UTC. The output is always in OBT. The user table can define either bad or good time intervals. The output time intervals are always good ones. For the definition of the ISDC Julian Date (IJD) and details of user GTIs creation see Introduction to the INTEGRAL Data Analysis, [1].