Gati refers to a specific but fixed time-interval between any two beats within a tala. It can again be of five types: Chaturasra, Tisra, Misra, Khanda and Sankeerna.
The important thing to remember here is that the common names for the types of Jaati and Gati are only indicators of the values 4, 3, 7, 5 and 9. Whereas Jaati refers to the external finger-counting, Gati refers to the internal count between beats in the tala-cycle. Jaati gives a structure to the tala and Gati determines the gait of the tala.